Tesco, the blue ones, cant think off the top of my head how much they are, but theyre cheap!

They seem quite popular though

*tootles of to tesco to look at nappy sack*

Im probably going to get funny looks from people! I look about 16! haha!

Same here

I buy cheap sandwich/food bags usually 100 for 75p from Asda but have managed to get 800 for £1 ina cheapy shop up the town.

Usually 200 black poo bags for £1 from the local 'everything' shop. We've got nappy bags that I use in the garden but I must admit I prefer not to see what I'm carrying when we are out! Also got some thicker scented bags but don't use them much, the thinner black ones are fine

I used to order mine in bulk from a company who supply councils etc. They were very large bags and biodegradable too. It's now more cost effective to buy Tesco biodegradable nappy sacks and I can get some easily if I run low. The Tesco ones are thick enough so you dont put your finger through and the poo inside is concealed nicely. They are fragrant and kind to the environment.

Tesco value nappy sacks here.

Biodegradable ones from the pet shop here!

Scented nappy sacks from any shop that sells them. I think we're using some from Sainsbury's.

Poo bags!, am sorry but when first read this thought it was some kind of expletive or something( ), is only dog folk that could discuss and give information on such things(i think)