Wonderful news. Yes an egg has arrived in the nest. Was watching this morning and saw this.

Though it may be an egg so waited until they had both gone out and sneaked in. Managed to get this slightly out of focus picture.

Over the last week they have been out from about 08.30 until 19.30ish. Lots of preening and clearly a close couple. There are 4 swifts flying round the house on a regular basis but as yet have not been able to locate another nest but I am fairly sure there is one. I am a bit disappointed as 3 years ago there were 5 successful nests, last year 4 nests but only two successful and it appears only two nests this year. Lets hope we get another egg or two over the next few days.