We have an egg

 Yesterday evening we discovered that our pair had laid an egg. Hooray! But...they had laid it outside the nest cup as you can see in this video:

 So, action had to be taken this morning. Which involves first checking that the swifts are out on their morning foray, and then Steve hanging out of the upstairs window next to the box with me hanging onto his trouser belt whilst he replaces the egg in the nest. We barely had time to do this and close the window again - literally five minutes or so - before our pair were back and in the box. Here they are happily settled down again on their one egg:

 

Hopefully we'll have more news on more eggs over the next couple of days.