Looks like B, the digital bank from Clydesdale and Yorkshire Banks (and soon, probably, Virgin Money) is launching a Marketplace.
Already available is an interactive app for FX and currency conversion, with what appears to be energy switching in development. B is calling for other digital partners to join.
It also looks like B will beta test new features on users who want to. Seems to be transforming into a fully–fledged challenger–type bank.