The site says they were £9.99 but the email I got from screwfix states these were £19.99. To avoid postage costs I bought some from my local store and the assistant checked with the manager as he thought it was priced wrong. No they're not.
20pce Stanley Screwdriver Set. Quote No: 54906
* High Torque Tri-Lobular Handles
* Strong & Durable Polypropylene Handles
* Rust-Protected Bar Plated with Boron Steel
* Heat-Treated Long-Life Tips
Slotted: 2 x (6.5 x 40mm), 2 x (5 x 75mm), 6.5 x 100mm, 5 x 150mm, 6.5 x 150mm; Phillips: #2 x 40mm, 2 x #1 x 100mm, 2 x #2 x 100mm; 6 piece instrument set, 2 x Hex Keys (Pozi & Slotted)