So the Transformers Age of Extinction toyline has finally reached the United Kingdom, and Argos is the first (as far as I know) store to stock the figures. Here are photos of what they currently had in store, though I did find out that both Leader Class Optimus Prime and Grimlock were already sold out (I think that was in about a day or so).
Aside from the Flip & Change figures, the Power Battlers/Attackers and the Construct Bots, they also appear have the AOE-style packaged re-releases of Universe/RTS Legends ("Legion") Optimus Prime, Bumblebee and Starscream, which were found at Dollar General and Family Dollar in the US. (They're also listed on the UK Toys"R"Us and The Entertainer websites, as well as the German TRU website.)