Sampha is probably my favorite British singer/songwriter at the moment. Here's a mix i made a couple of years back with some of his songs and some that feature him. Somehow this mix never made it to mixcloud but now it feels like a good time since his new brilliant album is out. Since this recording is pretty old, some favorites are missing, eg last year's TBD with SBTRKT.
You may also want to try these thematic mixtapes: https://www.mixcloud.com/RandomAccessRadio/donny-hathaway/ and https://www.mixcloud.com/attuhs/monks-dream/ .