Great Tit

Overcast for most of today but no rain as yet.
We have not had a peanut feeder in the garden before, we always have sunflower seeds and sometimes fat balls but in the hope of attracting a woodpecker I have now put one up. For the first few days nothing went near it but this morning there was a flurry of activity from a family of blue tits, a group of sparrows and this individual Great Tit all busily feeding from it.
I have just noticed after posting this that the Great Tit has a ring around it’s leg and it must be part of a survey