Prompted by reading through part of this I just went on the Lloyds on-line service. I did the on-line consultation and got a reply back within the hour and advice on which products to try which appeared to include just about everything ! The sidenafil were the cheapest option but were being charged at about £6 per 50mg tablet which is steep. I'm able to get my mates unused prescription sidenafil,( which he gets for nowt just because he can do),for £20 for 4x 100mg which I half each time so much better value.
I suppose that's the price you pay for the annonymity of going on-line. You do need to give your e-mail addy though and name and address so not really annonymous but safe enough for me as I don't have a other half to worry about.
May try the Asda as it seems the best value for the least hassle.