lovely photos - what camera do you use for these?
Sorry to hear about your 7D, I hope you get it back soon.
Some great pics again, Mark. It may be an idea to remove the suet ball from the mesh bag they came in and instead use a metal / wooden feeder. Birds' legs have a habit of getting trapped in the mesh and the general advice is to discard of them. I wouldn't want your Nuthatch to be hopping around in your photos:t:
http://www.rspb.org.uk/advice/helpingbirds/feeding/whatfood/index.aspx
You really need a gull expert, which definitely isn't me! Possibly a Black-Headed Gull?