Reassuring to know from the posts in this thread that it's not just myself that hasn't heard anything yet - I too rec'd a provisional offer 13th April, asked to provide a utility bill 13th May but have heard nothing since, no vetting log in's requests, it's immensely frustrating!!
I've emailed FHRU twice just to be advised that my doc's are with the relevant team & it could take a while to process but no info as to any sort of timeframe :-/