A good place to stay for a night or two specially if you've got an early morning flight to catch in Heathrow. You may want to ask for a taxi to pick you up from station to Kate's place; while it is near and 'walkable', it could be a tiring walk if you're dragging big luggage with you. It's ok tho if you only have a backpack but not quite as easy with big luggage in tow. Aside from that, Kate and Matthew were great hosts; Matthew was a nice chap to talk to.
Will definitely consider staying with them again if I'm flying to/from heathrow with a night layover.