Great Spotted Woodpecker (Dendrocopos major)
We associate the Greater Spotted Woodpecker with woodland, of course, and so gardens near woodland will have a higher chance of a visit. They are quite dramatic birds and always bring a bit of excitement when they appear.
They are very keen on peanuts, less so it seems on seed. The container needs to be easily accessible so that they have a clear flight path in and then out again, and they need a container they can cling to easily. The squirrel proofing cage here only helps to support the bird rather than prevent it getting access to the nuts.
The Great Spotted Woodpecker is common across Dorset so there could be one in your garden on your nut bag any time soon.