Apologies - when I setup the Plus expiry script and ran it because I thought the time had passed for it to run itself I forgot that changing the timezone on the machine doesn't actually affect processes (such as crontab) that are already running... Thus it still thinks its in New York and is therefore 5 hours behind what I expected...
Coupled with the fact that the expiry script ran on the OLD server this morning and blasted a load of e-mails out, people with Plus accounts expiring next week have been e-mailed three times now...
My apologies - it was a temporary thing and they won't keep spamming you!
Steve