Would have added this to
https://bitcointalk.org/index.php?topic=151137.0 but not able to post there yet.
The site was "currently offline" again for a while, after it came back I attempted to deposit some bitcoins.
Clicked "Bank Transfer", then entered bank details, then on the next page entered the amount in pounds. After clicking for the next page an error message is given that sounds like a code error rather than a message to a user. I've PM-ed piuk with full details.
Have done this on Firefox as well as Chrome.
That this happens just after entering bank details is a cause for concern.