In reply to 3leggeddog:
> No problem, it is ideal landfill. Rubble is inert, it is man made rock.
You're missing the point. It might be 'ideal' landfill, but current policy is to reduce reliance on landfill and therefore the number of landfill sites is generally on the decrease, and recycling on the increase. Therefore cost of landfilling any waste is on the rise.
As rubble is non-recyclable, the cost to dispose at landfill is quite high (landfill gate price is £20-40 per tonne, plus transport costs and landfill tax).
Most recycling centres are run be big waste contractors rather than council themselves, so they are trying to recoup/cover there own costs. If this leads to knock on costs (for fly tipping) elsewhere its not their concern. Plus as pointed out elsewhere, flytipping cost are usually carried by the landowner, so costs to dispose are incurred anyway.
Free market economy, great 'innit!