We suggest starting with
Wiggly Seed Extra.
https://www.wigglywigglers.co.uk/products/wiggly-seed-extra The reason is that this is a great value wild bird seed mix that is perfect for tubular seed feeders – we suggest
The One Feeder as it’s so easy to clean
https://www.wigglywigglers.co.uk/products/the-one-feeder-seed
It’s a nutritious mix small striped sunflowers, small black sunflower, canary seed, hemp, buckwheat, black rape and linseed. Many birds enjoy different foods at different times of year but the type of bird likely to enjoy it include
Set yourself up with a One Feeder
https://www.wigglywigglers.co.uk/products/the-one-feeder-seed a Bag of Wiggly Seed Extra
https://www.wigglywigglers.co.uk/products/wiggly-seed-extra and a seed scoop for easy filling
https://www.wigglywigglers.co.uk/products/droll-yankees-seed-scoop and you will be on your way to supporting your garden birds and enjoying watching all their antics…