Hobbycraft have some amazing Christmas Themed items at the moment, I LOVE the Wall Hanging 90cm Felt Christmas Tree for just £6, I don't think you could make it yourself cheaper!
They also have some fab Christmas Elf / Gingerbread Family / Reindeer / Gingerbread Man Bunting 1.5m / Make Your Own Stocking / Christmas Robin Felting Sewing kits for just £3 each, excellent way to keep the kids occupied whilst you sit quaffing vast quantities of mulled wine & mangling mince pies.
Some absolutely Gorgeous Advent Calendar kits including a Wooden Santa Truck Advent Calendar Base for £12, Wooden Advent Calendar Train 55.5 cm for £15 & a Sew Your Own for just £8
Plus lots more with prices from just £1 - Link goes to Tree - >> LINK TO ALL CHRISTMAS HERE<<
& will pop a few individual top picks in comments