Would anyone say its worth attending?
Hard to tell. I've been to some of these "launch" events and they've been a waste of time - all dry ice, Bill Gates (or some stand-in) saying nothing with any substance that's worth listening to and long queues to get a train at the end.
But then I lose a day's income on top of any train fare so I'm biased on judging the value of these things.
This looks to be a good use of time. There are some sessions that should deliver something of value, a day's training (or conference) covering the same material would want £300 registration fee from you, and the fact there is a community session at the end
of the day suggests there will be a chance to talk to peers - often the best value at an event like this.
Of course if all the reports of the £1000 software giveaway to each attendee prove true then you've got yourself a bargain and will be grinning from ear to ear at the bargain you've got.
It's your choice, but frankly if you're worrying over whether a day about the latest tools release is worth £45 then this event probably isn't aimed at you.