My understanding is that there is a contractual element between the APAT and their sponsors in that things are only signed off around 6 weeks (or possibly less) before any event.
I could be wrong (it"s just something I seem to recall hearing).
So, let"s assume that the next event was to be held August Bank Holiday weekend (gosh wouldn"t that be sweeeet?), then the earliest we could hear would be mid-July.
I know that this doesn"t help in your situation but that"s life in poker. On the brighter side, you may be in luck for Season 2....
From speaking to some of the APAT guys, I beleive (again, only what I gathered...not definite), Season 2 could be a lot more set in stone with dates and venues announced well in advance.