diff --git a/docs/open-methods.md b/docs/open-methods.md
index 6cb93a39..315c0cdf 100644
--- a/docs/open-methods.md
+++ b/docs/open-methods.md
@@ -5,6 +5,6 @@ We are using modern open working methods to carry out important analyses whilst
 
 We believe that researchers should be openly sharing all analytic cods and development insights in order to accelerate development of analyses and tools by other groups with other datasets.
 
-Our tools are build using Python, SQL and Docker. Analyses can be carried out in Python, R or Stata.
+Our tools are built using Python, SQL and Docker. Analyses can be carried out in Python, R or Stata.
 All our code including analytic code is shared on GitHub and is open access for efficiency, reuse and collaboration.
 We encourage external review and reuse of our code.
diff --git a/docs/type-one-opt-outs.md b/docs/type-one-opt-outs.md
index f8c2dd36..232491f9 100644
--- a/docs/type-one-opt-outs.md
+++ b/docs/type-one-opt-outs.md
@@ -1,7 +1,7 @@
 ## Background
 
 The OpenSAFELY platform was established during the COVID-19 pandemic; the legal basis the platform originally operated under was for the monitoring and control of communicable disease and other risks to public health.
-NHS England policy was that the [Type 1 Opt-Out](https://www.nhs.uk/using-the-nhs/about-the-nhs/opt-out-of-sharing-your-health-records/) [[archived here](https://web.archive.org/web/20250401015716/https://www.nhs.uk/using-the-nhs/about-the-nhs/opt-out-of-sharing-your-health-records/)] was not required to be upheld due to the overriding public interest in responding to the COVID-19 pandemic.
+NHS England policy was that the [Type 1 Opt-Out](https://www.nhs.uk/using-the-nhs/about-the-nhs/opt-out-of-sharing-your-health-records/) [[archived here](https://web.archive.org/web/20250401015716/https://www.nhs.uk/using-the-nhs/about-the-nhs/opt-out-of-sharing-your-health-records/)] (T1OO) was not required to be upheld due to the overriding public interest in responding to the COVID-19 pandemic.
 In June 2023, the [legal basis for the operation of the platform](https://digital.nhs.uk/about-nhs-digital/corporate-information-and-documents/directions-and-data-provision-notices/data-provision-notices-dpns/opensafely-covid-19-service-data-provision-notice) [[archived here](https://web.archive.org/web/20250414105355/https://digital.nhs.uk/about-nhs-digital/corporate-information-and-documents/directions-and-data-provision-notices/data-provision-notices-dpns/opensafely-covid-19-service-data-provision-notice)] changed to powers that traditionally _do_ uphold a Type 1 Opt-out.
 Therefore, since June 2023, the OpenSAFELY platform has been required to exclude patients with a Type 1 Opt-out from all projects, except those explicitly described in our [Data Access Policy](data-access-policy.md) and [Data Protection Impact Assessment](https://digital.nhs.uk/about-nhs-digital/corporate-information-and-documents/directions-and-data-provision-notices/data-provision-notices-dpns/opensafely-covid-19-service-data-provision-notice#further-information).