While I agree that anyone whose use of a mobile while driving endangers others should be prosecuted, why do we need a particular law ? Surely we have plenty of other laws that would cover this if they were being properly enforced ?
Driving without Due Care and attention should be enough to cover all manner of twattish behaviour behind the wheel, using a phone, fiddling with the radio, swatting at your unruly brats in the back seat, applying makeup, lighting cigs, reading the paper, having your stereo turned up so loud that people inside the houses you are passing can hear it, and so on and so forth.
If this law is not being enforced, what chance for a new, far more specific one ?
As for a few of the other issues :
The main reason there aren't more traffic cops is probably because the standard of driving in this country is so piss poor that we would need to build lots more prisons.
There is to a 'rabid' drivers lobby. These are the people who think being fined for breaking the law is a 'stealth tax', by extension so is a fine for public urination, littering or vandalism. Motorists aren't persecuted, they just offend a lot. Deal.
As a cyclist, I have to say that anyone riding while talking on a phone is a twat, since you really do need both hands to be properly in control, this is particularly so at low speed when the vehicle is at it's least stable due to lack of forward momentum. Also, your steering is seriously affected by the position of your head and upper body. I fully expect some dickwad from the likewise rabid cycling lobby to contradict this.
As for getting your toes run over in the city centre by cyclists, you may want to make sure you aren't walking somewhere that's actually a designated cycle route, you'd be surprised where you local authority think it's a good idea to put these. Look out for post card sized blue signs on widely separated lamp posts. There's one here runs the length of the only fully pedestrianised street in the city, which (being the actual High Street), is also the busiest, most pedestrian choked we have. Unfortunately, the alternative is a dual carriageway leading to a three lane, four exit monster roundabout*.
If you're sure this isn't the case, get a boot in on the idiots from me.
*personally, I enjoy the cut and thrust manoeuvring, thrilling near death experiences and incompetent driver apoplexy that comes with maintaining proper lane discipline round such a beast in a world full of people who can't see you and/or don't care if they run you over, but it isn't to everyone's taste.