Saw this on my way to work today, so got off the bus early to investigate. My local superstore in Cardiff didn't have any of the larger Star Wars sets, but did have the Freeco Speeder, Luke's Landspeeder (one left at 8:50am), Assassin Droid Battle Pack and the two Hoth battle packs. It also had space on the shelf for Plo Koon's Starfighter, but they didn't have any out. I asked and they said they probably had some out back, but due to them having so much in and it not being well organised, they couldn't really go and look for it.. I picked up the Freeco and Assassin Droid pack as I had neither and might pop in on my way home tomorrow just in case they've got some of Plo Koon's out on the shelf, as it's not really out my way.
For other themes they had most of the smaller sets.. there was nothing out with an RRP higher than £25 as far as I could see, and most of it was a lot less (e.g for Toy Story they had Lotso's Dump Truck and Woody and Buzz to the Rescue).