Wagtails at Bottisham Lock

I was hoping to capture some Swallows but they were not much in evidence, so at this point I don't know whether the numbers are down or whether the wet and windy weathers recently have disturbed the breeding routine.   There is obviously a Pied Wagtail nest very near the Sluice with plenty of dragonflies or damselflies for the taking.   I've seen Grey Wagtails near the lock in previous years so reassuring to see one recently.