Hello all ... we noticed last weekend when we lit our gas oven in our Swift Challenger 570 that the gas flame was very orange, high, roaring and bright - quite the opposite to a quiet blue flame! The gas grill worked perfectly. Anyone had experience of this or any ideas as to what it could be? OH is a Chef and couldn't see anything on the oven burner. We have booked the van in for them to take a look in a few weeks (still under their warranty) and quite rightly we won't be using the oven until it's fixed. Just wondered if anyone else had has happen to them at all? Thanks Lisa.