In the news

The main reason that cycling is nicer in Copenhagen than in London is that in the streets of Copenhagen, just as in Amsterdam, there are many more cyclists and the law does not criminalize bicycling

Please specify in which way the law in the UK 'criminalises' bicycling.

Also, in the Netherlands and in Denmark, using cycle tracks is mandatory. Where one exists, you're not permitted to ride in the carriageway.

... If London was to invest 1/4 of the road budget for bicycling--- as is the case in Copenhagen--- and toss in Dutch style at fault, we'd see a great drop in accidents.. and with it more bicycles... As long as the government lets motorists feel that its "their roads" and down talks cycling...
In the Netherlands at least, serious injuries to cyclists have increased considerably in the last fifteen years or so (without a corresponding increase in cycling). The myth that they decreased arose because Dutch police effectively stopped recording crashes. Recent work on hospital data has produced better figures.

http://www.swov.nl/rapport/R-2012-09.pdf

I haven't studied crash stats in Denmark yet (need to learn a bit of Danish first).

It is generally a mistake to think that you can sort out streets by investing in one particular mode. Good street design is inclusive and flexible. I obviously agree that a lot needs to change in the way in which investment is targeted, and that considerable changes to infrastructure are needed.