How much is an iPhone 5s replacement from Apple?

I can't find a definitive answer on google. I Remember when I broke my 4s a few years back I went to the apple store and paid for a replacement and it was £130, how much is it now? Do they still do this?

They likely take the value of the phone at the time towards the value of a replacement. So it would depend on the condition, etc of your phone now.