At the moment they're still a little uncertain, but it looks like the P10 will be available in March for about £550, with the P10 Plus following later for about £600. High prices, but not the highest, and given the specs of the phones, not too bad.
The wait is agonising! I could pre-order from FNAC in France for €599 - £523 and they're happy to deliver to the UK. They say the P10 will be available from 24 March. I wish I had at least an indication of UK pricing and availability. The Huawei store in the UK has it on pre-order for £599 but is 'sold out'. Not sure how you can sell out on a product not yet available though.
Bought the mate 9 from three for£559 £550 +£10 credit absolutely stunning phone didn't know it would he this good coming from Nexus 6p build quality is the best I have had on any phone so the P10 is looking good and i the the prices are reasonable compared to other flagships for the specs
Carphonewarehouse are listing it now. They are listing it for £570, but they are generally not the best for SIM-free prices so you'll probably be able to get it for less elsewhere soon. They are also only showing Gold and Black colours at the moment.