Soil for raised bed

(Novice gardener.)
I have a raised bed approx 25'L x 1'D x 2'W.
It is over heavy clay soil.
I'm not set on what to grow in it: probably a mix of veg and flowers, (but nothing tall).

What would be a good, general soil / manure / compost / etc mixture to fill it?

 

Go from rough to fine.

First put a layer of raw materials (whatever you find in plant based leftovers), then chipped prunings, rough topsoil, not-yet-perfect compost and finally some good planting soil with real compost.

 

I was thinking of something like 1 ton bags of manure and topsoil. Will JI2 need mixing with anything else?

 

I got a couple of builders bags of compost/soil mix from compost direct for raised beds and general use earlier this year. One called black gold and the other veggie pro. The veggie pro had topsoil in it from what I could see and some weeds. The black gold, hmm I wasn't that impressed with the structure of it, if it dries out it doesn't seem to absorb water that well. My tomatoes are growing in it as is sweetcorn but I used Jacks Magic last year for toms and sweetcorn and felt I had better results with it than the stuff from compost direct. I can't remember what I paid for it - was at least £250 delivered up here.

 

First time ever, earlier in the year I bought a bulk bag of garden compost to add to my vegetable plot.
I was quite impressed with the quality and it appears to have been totally weed free.
I got it from here.
Gold Blend Peat Free Soil Bulk Bag

 

You shouldn't have any problems there, virgin soil that has been through an 8mm screen blended with spent mushroom compost.

The problems are when you buy from greenfield sites, where the problems start, but who is to blame?

I watched a programme called "Inside the factory" there was a part on how whiskey is bottled in fully recycled bottles. What people put in glass bottle banks is unbelievable, the different types of processing from magnets, light, hand picking etc etc to get out all the foreign objects. It's not just tin cans and plastic bottles but people are even putting in knifes & forks and other types of metal. The same goes for green compost, what some people put in the green bins is unacceptable, yet the manufacturer tends to get all the blame. Green compost is exactly that, it is supposed to have minimum processing, so making it sterile, objects free and weed free is highly unlikely. To do that, it would involve more processing, then it can't be classed as being green.