Help to identify a bird

Could be a young Robin getting his red breast.

Thanks but it was about 50% bigger than an adult robin.

I don't think it was a young goldfinch as it had no yellow on the sides or red around the face. It was quite aggressive attacking blue tits that came near the feeder.

I wonder if it could have been a chaffinch?

could be a nuthatch
www.rspb.org.uk/.../

Could have been a Bullfinch, they have an orange breast but it is quite vivid.

That's it, thanks for solving the mystery.

Interesting. I’ve read that nuthatches can be quite aggressive towards other birds but the one I have visiting my feeders just minds it’s own business, grabs some nosh and then clears off.