Hunting HOBBY

At 10:15am driving along the lane to Little Marlow GP my attention was drawn to a HOBBY that was below roof top height about 100yds past the King's Head pub. It appeared to be trying to catch House Martins from around their nest site under the eaves of one of the houses and kept stalling and diving in a very tight area in front of the nests. Never seen this behaviour before, although I have seen them catch House Martins from flying flocks. I guess this might indicate it has a juvenile to feed somewhere, although it was not successful on this occasion (Adam Bassett)