faqs added and user guide updated

Author: Rachel Calkin

ukllc_book/docs/faq/faq_intro.md

@@ -1,5 +1,8 @@
 # Frequently Asked Questions
->Last modified: 20 Jan 2026
+>Last modified: 19 May 2026
+
+
+Last modified: 19 May 2026
 
 <div style="background-color: rgba(0, 178, 169, 0.3); padding: 10px; border-radius: 5px;"><strong>FAQs based on enquiries received by researchers working in the UK LLC Trusted Research Environment.</strong></div style>  
 <br>

ukllc_book/docs/linked_geo_data/place_faq.md

@@ -1,6 +1,6 @@
 # FAQs about working with place-based data 
 
-> Last modified: 02 Mar 2026
+> Last modified: 22 May 2026
 <div style="background-color: rgba(0, 178, 169, 0.3); padding: 10px; border-radius: 5px;"><strong>Answers to researchers' questions about working with place-based data.</strong></div style>  
 <br>
  <details>
@@ -80,4 +80,16 @@ Geomodelled datasets have match scores i.e. only place-based datasets that requi
 <summary>What are the potential disclosure risks of linking at property level vs postcode level?</summary>  
 
 For household level data that is added to the UK LLC TRE, the datasets have passed disclosure control checks at the UPRN/household level. When a postcode is geocoded, it is associated with multiple UPRNs – on average there are 15 properties in a postcode. While the risk is marginally higher for full address level data, it is still minimal because of the robust disclosure checks prior to data entering the TRE. 
+</details>
+
+<details>
+<summary>Is there any geographic data available for LPS that do not currently have the permissions in place to link to place-based datasets?
+</summary>
+
+For LPS that do not currently permit place-based linkages, there are two sources of placed-based data:  
+1) Index of Multiple Deprivation (IMD) is available at participant level in some of the linked NHS England datasets (e.g. Mental Health Services Dataset (MHSDS) and Improving Access to Psychological Therapies (IAPT).  
+2) English regions and devolved nations (Scotland, Wales and Northern Ireland) are available 'in the clear' (i.e. not encrypted) in the UK LLC TRE.
+
+The linkages permitted by each LPS are summarised Guidebook's '[permitted linkages](../lps_partner/linkages/lps_linkages.md)' page. 
+
 </details>

ukllc_book/docs/linked_health_data/nhs_england/coding/codes_faq.md

@@ -1,5 +1,5 @@
 # FAQs about codes used in Electronic Health Records (EHRs)
->Last modified: 24 Nov 2025
+>Last modified: 22 May 2026
 <div style="background-color: rgba(0, 178, 169, 0.3); padding: 10px; border-radius: 5px;"><strong>Answers to researchers' questions about diagnostic and procedural codes.</strong></div style>  
 <br>
 
@@ -62,3 +62,9 @@ There is not a a 1:1 relationship between the two coding systems, but there are
 
 A summary of which datasets use which codes is on Guidebook's [Coded variables](../coding/coding_intro.md#classification-systems) page.
 </details>
+
+<details>
+<summary><b>HESAE</b> includes both ICD-10 and AEDIAG codes - which should I select?</summary>
+
+Although ICD-10 codes are permissible within HESAE, approx. 98% of the coding uses the AEDIAG ('Accident and Emergency Diagnosis') scheme. When requesting the HESAE, it is advisable to provide a code list based on AEDIAG rather than on ICD-10. More information on the HESAE dataset is [here](../hes_datasets/ae/understanding_hesae.md). An explanation of the AEDIAG coding system is available in the <a href="https://v2.datadictionary.nhs.uk/web_site_content/pages/codes/administrative_codes/a_amp_e_diagnosis_tables.asp@shownav=1.html" target="_blank" rel="noopener noreferrer">NHS Data Dictionary</a>.
+</details>

ukllc_book/docs/linked_health_data/nhs_england/hes_datasets/ae/understanding_hesae.md

@@ -1,5 +1,5 @@
 # Understanding the HESAE dataset
->Last modified: 27 Feb 2026
+>Last modified: 22 May 2026
 
 <div style="background-color: rgba(0, 178, 169, 0.3); padding: 5px; border-radius: 5px;"><strong>HESAE is a record of Accident & Emergency (A&E) attendances in NHS hospitals in England.</strong></div>  
 
@@ -95,4 +95,4 @@ Below we will include syntax that may be helpful to other researchers in the UK
 ## 13. Further reading  
 Hospital Episode Statistics as a whole are covered in more depth elsewhere in [Guidebook](../apc/understanding_hesapc.md).
 
-Information on the structure of HESAE and the coding systems used can be found in the <a href="https://www.datadictionary.nhs.uk/index.html" target="_blank" rel="noopener noreferrer">NHS Data Model and Dictionary</a>.
+Information on the structure of HESAE and the coding systems used can be found in the <a href="https://v2.datadictionary.nhs.uk/web_site_content/pages/codes/administrative_codes/a_amp_e_diagnosis_tables.asp@shownav=1.html" target="_blank" rel="noopener noreferrer">NHS Data Model and Dictionary</a>.

ukllc_book/docs/linked_health_data/nhs_england/hes_datasets/hes_faq.md

@@ -1,5 +1,5 @@
 # FAQs about HES data
->Last modified: 03 Dec 2025
+>Last modified: 22 May 2026
 <div style="background-color: rgba(0, 178, 169, 0.3); padding: 10px; border-radius: 5px;"><strong>Answers to researchers' questions about working with linked hospital data.</strong></div style>  
 <br>
 
@@ -19,6 +19,11 @@ Examples of non-specific codes include “R69=Not known” for diagnoses and “
 UK LLC is considering the way it makes linked health records available, by initially making unfiltered views available to researchers (with particularly sensitive records removed) rather than asking for codelists upfront. This will allow codelists to be developed whilst working with the data, but will also allow exploration of records which do not have specific codes assigned.
 </details> 
 
+<details>
+<summary>What is the difference between the <b>HES*</b> datasets and the <b>HES*_OTR</b> datasets?</summary>
+OTR stands for 'other'. These tables include information not found in the main HES* tables. They are provisioned automatically to all projects using HES data as they are a subset of HES. In the most recent extract of NHSE data (expected to be available in summer 2026), the _OTR versions don't exist. All the HES data will be in the main HES tables.
+</details>
+
 <details>
 <summary>What do the <B><i>_ACP</i> and <i>_MAT</i> </B> suffixes refer to in HES data?</summary>
 

ukllc_book/docs/linked_health_data/nhs_england/mental_health_datasets/mh_faq.md

@@ -1,5 +1,5 @@
 # FAQs about working with mental health data
->Last modified: 06 Feb 2026
+>Last modified: 22 May 2026
 <div style="background-color: rgba(0, 178, 169, 0.3); padding: 10px; border-radius: 5px;"><strong>Answers to researchers' questions about working with mental health data.</strong></div style>  
 <br>
 
@@ -89,5 +89,11 @@ Information about study participants diagnosed with mental health conditions, in
 <summary>What does the term “in contact with mental health services” mean in the context of reporting? </summary>
 
 The term refers to individuals who have an active referral to mental health services during the reporting period. An active referral means the case remains open at the end of the reporting month, regardless of whether the person has received any appointments, interventions, or recorded care activities under that referral.
-</details><br>
+</details>
+
+<details>
+<summary>Which Longitudinal Population Studies (LPS) are linked to the mental health datasets?
+</summary>
 
+LPS linkage to these datasets, and how many participants are included in each, is shown in the <b>'Metrics' sections</b> of the individual dataset pages: [MHSDS](../mental_health_datasets/mhsds/mhsds.ipynb) and [IAPT](../mental_health_datasets/iapt/iapt.ipynb).
+</details><br>

ukllc_book/docs/user_guide/user_support.md

@@ -1,5 +1,5 @@
 # User support
->Last modified: 23 Apr 2026
+>Last modified: 22 May 2026
 <div style="background-color: rgba(0, 178, 169, 0.3); padding: 10px; border-radius: 5px;"><strong>UK LLC is committed to helping all researchers to work effectively in the UK LLC Trusted Research Environment.</strong></div style>
 
 ## Self-service user tools
@@ -13,6 +13,9 @@ All researchers who have submitted an application or are already working in the
 ### Support from UK LLC
 If researchers are unable to find the help they require either in this Guidebook (including the [**FAQs**](../faq/faq_intro.md)) or via UK LLC's <strong><a href="https://www.youtube.com/@ukllcollab" target="_blank" rel="noopener noreferrer">YouTube videos</a></strong>, the UK LLC Data Team can be contacted at [**support@ukllc.ac.uk**](mailto:support@ukllc.ac.uk). 
 
+<aside class="admonition note"><p class="admonition-title">The Data Team offers 1:1 support sessions, via Teams, for researchers working in the TRE.</p>Please email the team to book a session.</aside>  
+
+
 > **The UK LLC Data Team** can provide assistance with:
 >* TRE account management
 >* User account permissions