Sony's excellent Xperia Z3 Compact has only just gone up for pre-ordering in the UK and it has already gone on sale. The Xperia Z3 deal, offered through a couple of online retailers, drops the Xperia Z3 Compact price from 429 GBP to just 348 GBP. That's a massive 80 GBP discount and it's still on pre-order! According to Amazon UK, the Z3 Compact will be available on September 29th.