Steven Fletcher's website is Powered by Open Source

While I don't know if the MP was directly involved in the decision, and whether this was a free/gratis or free/libre decision, but the website of Steven Fletcher is based on Free/Libre and Open Source Software.

Netcraft says: was running Apache on Linux

I don't know what Content Management System (CMS) is being used for the main site, but his photo gallary is using a GPL licensed software project hosted on SourceForge and written in PHP.