Just thought I'd do this quickly. Look at this road sign...
I'm assuming anyone who holds a current UK driving license will be aware that this sign signals that you can drive at the National Speed Limit. Therefore, on roads where you see this, the limit is 60mph, or 70mph for dual carriageways.
Anyone driving at 40mph past these signs deserves to have their bum stitched to their own mouth, thus completing the vile circle of detritus that they already represent in my eyes. I've thought about it and it turns out I'm not over-reacting.