Saw this ride on BR earlier and thought i'd see if anyone on here was up for it.
It looks to be a good introduction to sportives, starting from Long Ashton Park and Ride, heading out to Chew, over Burrington Coombe, through Priddy, Wedmore, Mark and Highbridge down to Burnham, then back up towards Weston via Berrow and Brean.
I know bits of this area quite well, it looks to be a nice run and I'm considering emailing the organisers for a bit more detail about the route so I can check it out myself, if not I'll just get on MapMyRide and try come up with a similar route.
By the looks of things you need to get your entries in by the end of the month, and it costs £22. The official website is at http://www.greatwestonride.com/.
I'm undecided as to if I'm going to ride it yet, but if some people off here would be up for it then I'd definitely consider it.