Thanks Jake,
Sorry Jake, yes its a v11 portal site.
I have looked at the global.asx.cs file (/app_code/Global.asax.cs), but it looks the same as others I have in demo sites that have not had ssl applied. I have also copied from the dancing goat demo, but still redirects to https?
I have even copied a webconfig file from the demeo site and updates the connection string, but even that still redirects to https?