OP gives no indication what their motivation might be to have a QR axle instead of a nutted axle, unless you read "big chunky" perjoratively.
True... if it's to not have to carry a bone spanner as well as a simpler multi-tool, then even other through-axles make a lot of sense, assuming tool has the right hex-key. I really liked the J-tek hub that came with a front wheel I got from SJScycles. Perhaps there's a similar one he could get for the back as well? It does seem perhaps a lot of expense for a £250 bike.
Although, having just tried out tubeless on my road bike, really would like that option on a brommie ... and Hutchinson, if you're listening, some Fusion5 All weathers for brommie too! Fingers crossed sealant actually works first puncture, but loving grip and rolling!
I'm still guessing that the reason they don't stick QR on the is because 90% of owners take them to a shop for a puncture.