"Is dangerous cycling a problem" BBC

The reasons for a 20mph for motor vehicles would be entirely different than for bicycles, notwithstanding the difficulty of enforcing speed limits for bicycles.

Given than the average speed limit around London is around 12mph, and that lowering the maximum limit to 20mph could well increase that average (albeit counterintuitively), it's a little churlish to suggest that 20mph "sucks". Perhaps it does indeed suck not to be able to smash down the loud pedal between jams and lights, but then being a grown up is not always peaches and cream for tea.

I assume you mean the average traffic speed rather than speed limit.

What I'd love to see happen is cyclists riding well together (instead of competing) and on difficult/dangerous junctions, eg Vauxhall to ride 2-3 abreast to calm the motorised traffic behind and also look after cyclists who are not so fast/confident.

During commuting hours cyclists are blocked /forced into dangerous positioning because of heavy traffic. The majority of the vehicles are private cars carrying only one person. But the attitude is still that one driver has priority over 5+ cyclists. It is very odd.