I duly put the nets up and waited for it to clear but as I said above it didn't. I had a few grounded migrants in the murk in the form of two Song Thrushes, a Chiffchaff, a Blackcap and nine Goldcrests. There was even some vis over the fog as I could hear Pink-footed Geese, Meadow Pipits, Alba Wags, House Martins and when it cleared a bit I saw a few Swallows and a single Snipe.
Before my nets became wet with the fog I did manage to ring seven birds as follows (recaptures in brackets):
Blackcap - 1
Goldfinch - 4
Chiffchaff - 1
Woodpigeon - 1
Robin - (1)
Blackbird - (1)
The forecast for tomorrow is for light southeasterly winds and cloud, so as long as there is no fog I'll have a ringing session at the Obs and if there is fog I'll just grill the patch for grounded migrants.