In central London it’s a rarity that cyclists aren’t running red lights putting pedestrians and other vehicles at risk. Then there are the weekend hoardes that think riding 2 or 3 abreast at 10-15mph is a good idea hogging the whole road. The worst.
Cyclists on London roads are the absolute worst! Loads have no regard for the Highway Code at all. Trying to drive over Westminster bridge at rush hour is terrifying because of the cyclist plague jockeying for position.