An update
Well this morning I had TWO Redpoll in the garden

They seem to hang about with the Siskins so now I know when they are around to keep a close eye out for them - they are quite difficult to see though when they are down the end of the garden.
Had the biggest number of Goldfinch in our sweet chestnut tree this morning - 6 altogether but they didnt all come to the feeders. This was nice because I normally only see the 2 and sometimes 3. The regular pair bring their youngster to the garden in the summer.