Becoming a Regular Event

I was out in the garden puppy proofing the fence in anticipation of Arrow's arrival in a couple of weeks' time when I heard the throb of Merlin engines again. Looking up I saw the Battle Of Britain Memorial Flight flying low over Finmere airfield again. That's twice in two weeks! This time the Lancaster was accompanied by a Hurricane, on its way from a display at Blenheim Park to a fly-past at Bletchley Park.