Common Sandpiper, Blackcap and a Swallow waiting an expert opinion

My first Common Sandpiper this year and a Blackcap, a bird I usually see in my garden each winter but not this year. The Swallow is very orange/rufous and I've asked if it could be a sub species or just a very macho male.

Addition: It seems possible that the Swallow may be stained with "Sahara dust" but I'll never know if that's the case or could it have been a lost variant.

Photos taken  in a very flat afternoon light but here for my records.

Common Sandpiper at Monikie CP

Male Blackcap in "Liz McColgans garden"

Swallow species