Elbow deep you say. Lucky printer. 1 min the forum was working then next error 504, then after a few mins I could get in. then it went again then slow ahhhhhhhhhhhhhhhhhhhhhhh
The 504 errors are mainly created at the host server, so most likely they web hosting co the 1000rr.co.uk is using had issues but solved the them quickly. Possibly server maintenance or a server crash and it took five minutes for backup servers to make the switchover.