Compost differences

I was running short of compost so I nipped to the local Garden Centre and bought some levingtons peat free with added john innes in 50L bags. It doesn't seem too bad but the bags were very heavy and I found out why when using it. It seems to consist of almost 1/2 and 1/2 of compost and a flinty gravel. You wouldn't want it going anywhere near where you might want to grow carrots or parsnips ever.

Is that the stuff in a red bag? If so I've got some of that too. It's a mix of composted bark, wood fibre, green waste compost and peat-free John Innes. I assume the gravel is from the John Innes. I've added perlite to lighten it up a bit, otherwise it's a bit claggy when wet. If you find bits of plastic in it (I've found quite a lot), keep the receipt, take a picture of it and the plastic, complain to 'lovethegarden.com' and they'll give you a refund.