Tesco are selling packs of 5 x 1st class postage paid envelopes at £1.50, down from the usual £3.80. Which makes them 30p per envelope, as a comparison, Royal Mail sell them in boxes of 100 for £50, 50p per envelope. Already a bargain then, but they are scanning at only 75p, which works out at each envelope with 1st class postage for just 15p (a 1st class stamp costs 41p).
Available instore only, they can be found hanging on plastic strips, generally in the stationery aisle, but have also been spotted elsewhere in store.
Credit to thelurch and caroc on MSE forums,
1st Class DL Envelope - Max 100g
Prepaid, self-sealing envelopes give your mail the professional touch.
*Peal and seal
*Suitable for A4
*Postage paid up to 100g and max depth 5mm
*For use within UK only
Photos to follow in a post below......