The sooner the better. 5 units out of 30-40 odd 170s and my pot luck in getting saddled with them is making me wish for a replacement bus. Awful states. The oldest relatively untouched interiors on the UK network? 21 years and counting... On the plus side it's nice to see the refurbs finally becoming more common. Looking forward to the time when you know the buffet will always be open!