diff --git a/constraints/constraints.md b/constraints/constraints.md
new file mode 100644
index 00000000..0bfa28d0
--- /dev/null
+++ b/constraints/constraints.md
@@ -0,0 +1,22 @@
+# Constraints
+
+The following document details the reasons why we do some of the things we do.
+
+## Our constraints
+
+As part of a big company that delivers scientific content, there are some constraints that define the work that we do.
+
+Particularly, the solutions that we deliver:
+
+* must be accessible,
+* must be Technically Robust and Performant,
+* must be Legally Robust,
+* will reflect Management & Org Structure,
+* are bound by our Infrastructure,
+* need to be appropriately Secure, and
+* need to reflect the Company's Stature.
+
+As a result of these constraints, the solutions that we provide are:
+
+* [Progressively enhanced](../practices/house-style.md#progressive-enhancement-and-browser-support)
+* Compliant with [WCAG 2.0 level AA](../practices/house-style.md#ccessibility)