Hi,
have just posted something about this in the Newly Diagnosed area of forum, as i too was charged almost £28 for 50, from Lloyds, so ended up ringing around all chemists and could not find any cheaper, only MORE expensive.
I then contacted manufacturers of my meter, and asked WHY they charge SO much, and got a nice reply, informing me they charge £15, and have no control over the mark-up added by chemists/retailers. They offered to supply me direct, at £15, half the price of 'over the counter'. Still to expensive for me personally, but at least it might help some people.