Scandinavian airlines seems to fly 5 times a day with a Boeing 737 from
Oslo Gardemoen (OSL) to
London heathrow (LHR) in 2010.
Norwegian seems to offer 3 daily flights with the Boeing 737-800 airliners, but they fly to London Gatwick airport.
British Airways seems to serve with around 14 flights a week
Oslo Gardemoen (OSL) to
London heathrow (LHR) in 2010. They do so with the A320 family.