These are the UK suppliers I use
Lords Sewing - https://www.lordsewing.co.uk/
Keith and his team offer unrivalled customer service, super fast delivery too when ordering on line. I purchase my machines and hoops etc, Floriani threads, Kingstar metallic thread and machine needles from here.
Keith also does lots of very helpful you tube videos including tutorials, machine maintenance and trouble shooting - https://www.youtube.com/c/keithlordsewing
Fireside Fabrics - https://firesidefabrics.co.uk/
I love Fireside Fabrics, super fast delivery and you know I cannot resist a bit of fairy frost!
Fabric Land - https://www.fabricland.co.uk/
I buy all my felt and fleece from here.
Rooftop Fabrics - https://www.rooftopfabrics.com/
Lots of nice fabric and chalkboard fabric is available from here.
Sew Pretty - https://www.sewpretty.uk/
I buy beautiful good quality leatherette from here, perfect for key fobs etc.
Lucys Machine Embroidery - https://www.lucysmylarandcrafts.co.uk/
The only UK supplier of genuine mylar sheets.
Empress Mills - https://www.empressmills.co.uk/
I buy my batting from here.
GS-UK - https://www.gs-ukdirect.com/
I buy all my stabiliser from here.