Hi aym280. I will check next time I go up the allotment.
I discovered last summer that Which! tests different sorts of composts to see how well they grow different sorts of plants. there are customer ratings too. Have a look on their website. You might not want to take their advice, but it at least tells you which to avoid at all costs so might save wasting some money.
Hi aym280. The compost is J. Arther Bower. £3 for 50ltr at B+M. They also have one called New Horizon, £2 for 35ltr. This is a little rougher than JAB but smells sweet. I had bought two and having checked it went back and bought another three. Ideal for topping up my potatoes in sacks.