I think which Magazine. Voted B&Qs own compost best from a trial they did, so am led to believe. Ive bought it myself and i don't have a problem with it...

I'm using it this year on their recommendation and apart from a wierd fungal growth that seems to explode over som eof the modules abuot a day after sowing (and which doesn't seem to affect germination) I haven't noticed any issues with it.... I think I'm getting better germination than I did last year using Wickes own brand.... which in itself represents good value at four 75 litre bags for a 12 quid or something similar.... has the OP looked at getting Wickes to deliver or are their charges too much?
(I'd not know, I drive a minibus converted to a skinny camper and I work next door to a Wickes adn the place I'm moving to is almost next door to a Wickes.... I never have to get stuff delivered

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chrisc