I bought the Lloyds Pharmacy Allergy Reliever last Saturday after reading about it on the Moneysavingexpert forum. It was £15 but there is a voucher you can print off on the Lloyds site for 10% discount, I'm off to buy another one for DD today.
I've not had a single anti-histamine since I started using it last Saturday. If you do a google for "medinose" it gives details of how it works, the Lloyds one is based on the same principle but a lot cheaper as it is now on special offer.