Trusted UK Suppliers
This is not an exhaustive list and currently none of the companies listed knows I have put them here, though I'm sure they won't complain about the free publicity. This list is likely to change and the sites aren't in any specific order, if you wish to check out their websites then click on the pictures.
The Vine Trust Bookshop is a Christian bookshop in Andover, Hampshire, UK.
Lakeside Needlecraft is where I purchase the majority of the threads and fabric I use to stitch samples of my designs. They sell everything you need to create any cross stitch patterns you want to kit up. They sell kits and charts from various designers and they are all high quality. They also have very good customer service and any issues are dealt with quickly and efficiently. I have done various patterns from Lakeside Needlecraft and found then easy to follow, even the backstitched designs.
Caterpillar Cross stitch does beginner friendly cross stitch charts and kits. The kits are in cardboard packaging and they are launching a crochet branch soon. I often get a variety of projects from here as I like to sometimes have designs without backstitch or ones I can add the backstitch how I feel as I go and these are perfect for this and are some of the most effective cross stitch only designs I have found.
Companies without websites...
Pennies: This is a haberdashery in Andover, Hampshire, UK.