Swallows returning - NOT amateur radio

To me, spring is traditionally heralded by the return of migratory swallows from southern Africa.  

Here we see far fewer than we used to although swift numbers seem to be holding up, despite there being fewer natural nest sites. We don't usually see swifts here in East Anglia until May. Often you can hear screaming feeding parties and then look up and see them.

Apparently some swallows have already been spotted in Devon. 

There was a December record in South Devon, so this one may have attempted to over-winter. I don't know if it survived. With climate change and milder winters some might attempt it and survive.

See https://www.rspb.org.uk/birds-and-wildlife/swallow .