Free Bra Straps!
I've just had an email on my sparks account saying I could get £5 off full priced bras, so I searched by price and found these clear bra straps for £5 and thought I'd try it and it worked so I got them free!
Join M&S Sparks loyalty scheme for free. You earn "Sparks" as you shop which turn into rewards. Plus, in the past, members have received emails giving £5 off shopping; early access to sales; and invitations to special events.