Returning to a contract after three months ??

[NickFitz]

To what resolution does this requirement go down to? London is a big (scary) place.

Here's the HMRC handbook's bit on it, including links to all the other bits of the handbook that have a bearing on it, and example scenarios that have probably been carefully crafted to allow them to argue in all cases that they don't apply.

Dolgellau gets a mention though. Nice countryside round there