All GBP trading pairs have been delisted.
It makes sense. The market was tiny and the fees were ridiculous. I think withdrawal cost £60.
There are options like Fidor that do cheap EUR conversion and SEPA. It would never occur to me to enter a GBP market. They're all very inconsequential.
What I really don't get is that this appears to be the first time they've made an official statement about how useless they are, yet people have been complaining for months and years. One quick browse of here and elsewhere would've told them that.