You can get loratadine at most cheapy shops for a pound or less for 30 tablets (I've had them for £0.79 before)... Not a deal to me when you add the postage on.
£4.49 at Amazon with free delivery possible
Nope they are both non-sedating, simply a question of seeing which one works better for you
No. Both are non-drowsy, compared to older anti-histamines, although it's true that in studies slightly fewer people reported feeling drowsy with Loratidine than Cetirizine.
Or.... Six months of Loratadine (6 x 30 tablets) slightly cheaper direct from Pharmacy First at £4.79, with free P&P - http://www.pharmacyfirst.co.uk/6-month-supply-loratadine-tablets-30-pack-clarityn-alternative-free-delivery.html Four months of Certirizine (4 x 30 tablets) for £2.79, with free P&P, also direct from Pharmacy First http://www.pharmacyfirst.co.uk/offers/seasonal-deals/hayfever-offers/4-x-cetirizine-10mg-tablets-30-tablets-free-delivery-4xt115.html