With the hayfeaver season rocking up quicker each year, it's getting more and more expensive!!
Chemist-4-u have a good selection of generic and branded products at discount prices.
eg - 30 generic Citirizine (Zirtek) or 30 generic Loratadine (Clarityn) are only £0.99 per pack.
28 generic Chlorophenamine (Piriton) are £1.59 and generic Cromolux eye drops (Opticrom) are £1.45 for 10ml
Oh, there's also a 10% voucher kicking around
Obviously as there is a delivery charge, the more you buy in one go the cheaper it works out. I bought from these last year and got quick delivery