Under Group 14 of shedule 5 of the VALUE ADDED TAX ACT 1983:

PERSONS RECEIVING CHEMOTHERAPY TREATMENT, HAVE POST OPERATIVE HAIRLOSS OR HAVE ALOPECIA AREATA OR TOTALIS, ARE ABLE TO GET VAT DEDUCTED FROM THE PRICE OF THEIR WIGS.  PLEASE ASK US FOR MORE DETAILS WHEN YOU VISIT US. THANK YOU.

A false declaration is a criminal offence.