@TheLocalYokel the trouble with policing is it either covers vast vast areas that are less densely populated or smaller more densely populated. I have no idea of the policing structure in terms of teams, hierarchy, structure of the policing within each force. If you have one big force covering a vast area, which I like the idea on paper, you risk at big events pulling your resource from one part of the coverage area to the localised area that then needs it. Does that work?
Personally what needs to happen, which is unlikely to, is an increase of policing.
Currently there are 67,886,011 citizens in the UK. UK police force numbers stand at at 135,301. That is 1 police officer to every 501 citizens. I would like to see that increase to 1 police officer to every 250 citizens. Therefore doubling the police force. That will not happen overnight. But there should be a long term plan. Of course to achieve that objective there are many variables to take into consideration, some easy and some not so easy to account for. Maybe the first objective should be getting 1:400. That I believe takes the force up to 170,000 officers. No small feet when you look at but investment is worth it.
Of course we the tax payer pay for this. And that's about getting corporations to pay their fair share (google, amazon, Starbucks). Coupled with the fire service, NHS, Social Care and Teachers and other public servant staff fighting for your attention it soon becomes a nightmare to work budgets out. But then that's where levelling up the economic power of the country, truly unlocking areas with true economic power (Nuclear power plants in ex mining towns anyone>), job prospects in those areas and others with good wages etc comes into it. And here we go; I'm canvassing for your vote. Except I'm not.
You're right about police forces pulling resources from other areas from their force area to deal with major events but that already happens. Larger forces would provide greater flexibility of operation.
Police can only use such force as is reasonable in the circumstances to arrest or manage incidents. The circumstances of the student protests that turned violent at times would probably allow a higher degree of force to deal with the situation, but in the end only a court can judge how much. Where people sit down in the road and passively refuse to move it's highly unlikely that a court would decide that the same level of force by the police was reasonable.
As for using tasers on passive road-blockers, I can't think of any circumstances where the current law would deem the use of a taser reasonable. In fact, a police officer who did so would probably find him or herself before the court charged with an assault.
The police cannot be expected to act outside the law. When there is evidence that they have they are dealt with. Two or three years ago a female officer in Bristol was charged in connection with what was deemed unlawful use of a taser when she and a male colleague confronted an individual they believed was wanted by police (wrongly as it turned out). I believe the court acquitted her but it shows how officers have to be very careful with tasers.
It's easy for us to say the police should come down harder on the environmentalists who, although often acting in a way that disrupts society, generally don't enter into circumstances that would justify a harder (which really means a more violent) police approach.
If society really believes that passive protesting ought to be liable to a much firmer police approach then the law must be changed to permit it, ie allow a less restrictive definition to how much force is reasonable in the circumstances. I would support that although I doubt that tasering would be permitted.
Addendum
I don't know if the new Police Bill about which there have been many 'Kill the Bill' protests addresses this in any way.