Money off M&S post surgery bras, VAT Free!!

Hi, fed up with my operation bras I took myself into a socially distant Marks and |Spencers today to get something new and prettier, using the details I got when fitted for my first post op bra with prosthesis.   I got two pretty ones, then saw they have a range specifically for post surgery, I was unaware of that, and delighted to find tickets on the post op ones , saying that so long as you sign a declaration on the back of the ticket, your purchase( if youve had surgery) is tax free no VAT!! so I signed, only applies to their limited specific  range of post op bras, not the" fancy" ones, but its a small saving.ansd they gave me a free big hessian carrier as I used my sparks card!