Not quite on location: Concorde flyover...of course not

I was reworking a previous painting into digital form when I thought...hmmm...empty sky, bet Concorde is going to look good flying across it! And so this happened. 

Setting is based on Napa Valley.

What inevitably happens when I draw skies...Concorde!

At first I was just practising drawing skies (and clouds) on the new watercolour paper...but every white space under the sky is tempting me to add something there...and what inevitably happens is...Concorde! Of course :P