Camera now sorted. Bought a Panasonic GX80 with 12-32 lens - £370 from John Lewis. Seems like a fair deal with 2 year guarantee.
It performs beyond expectation and is superbly built. The low light performance is extraordinary with ISO going down to 25,600. Will see how I get on with the lens but I may go for a 15mm f1.7 Lumix/Leica Summilux or a Lumix 25 f1.7 later.