We don't 'sometimes' use Miles Per Hour in the UK. We always do and always have done.

If you can't be 'composed' as a cop, you should not be a cop.  US cops should take note.

British police cars have ANPR (Automatic Number Plate Recognition).  This computer-checks for insurance with the national database.  If a British police car pulls up behind you, your insurance status is automatically checked.

Preservation of life is more important than catching someone and putting people at risk. UK cops work this way

That car can run for 8 hours and still be followed, the police will just follow it forever. The problem with being to aggressive is that you force the 'criminal' to be more reckless thus putting more people at risk. Given the size of British roads - ask any American tourist who struggles with British roads - a BMW going at 100 mph through town streets is quite scary. Very, very well trained drivers who have one eye on public safety rather than just the criminal. These guys are full time professional drivers from a country that provides great F1 & Rally drivers, amazing!

we have always used miles per hour . It is called Imperial measurements , we have never fully embraced metric

Ordinarily British police do not carry deadly weapons.  Armed response has to be specially ordered.

German here, that show is "Police Interceptors" and there have been many seasons were they followed different police departments all over England.
I always found it fascinating when they did pursuits or traffic stops maneuvers like this because they do things very specifically, like when they turn onto another road they relay that thrice or for these boxing in maneuvers like you see in the beginning they need to get special approval and then they execute it in a certain way, depending on how many cars there are.
I reckon it takes a lot of training to have 3 or 4 cars simultaneously box in and slow down a moving vehicle.
It always looks more clinical then the police chases you see out of the US.

I am a retired Roads Policing Officer - Trafic Cop - here in the UK. Just a little background. In order to engage in pursuits like this you have to be an "advanced driver" in a "suitable vehicle" and also be "TPAC" trained. In order to reach that level you need to go through (for me at least) a 1 week basic car course, a four week standard car course, two day initial phase pursuit, a four week advanced car course, then finally a week-long Tactical Pursuit and Containment Course. These are all done over years, and there is a lot of on-job road experience obtained between these courses. Once you reach the top level, you are re-assessed periodically by undertaking "refresher courses". We are therefore Tier 1 when considering on-road driving skills. Compare this with the US, where, at most, officers are released after doing a weeks course, usually less, driving in and out of cones and around a race track. All of our training, including high-speed training, is undertaken on the road. Also, many of the tactical contact interventions used in the US would be illegal here. Overt there, if the person dies during the pursuit, the police are rarely held accountable. Here, sadly, it is very different. If something goes wrong here, they ALWAYS look aggressively at the police drivers, intending to try to find fault, and will not hesitate to prosecute the police. We therefore operate in a state of fear because of this. As an example, there is video online of a PIT manoeuvre being undertaken by a US state trooper at 109 mph. Both the suspect and police vehicle crashed, with the cop seriously injured and the suspect killed. Here, the officer would be charged with murder for doing that. We won't PIT above about 25mph because of the danger. Our rule is to follow, at a safe distance, until you get enough units, then move up and box them in. We have to constantly undertake, and broadcast, dynamic risk assessments, commentary on road, weather, traffic and other conditions, as well as commenting on the behaviour of the driver we are following, all the while avoiding being drawn in to potential traps, such as a reverse ram. It is emotionally and physically exhausting.

Our officers are generally much calmer than in the US. They don't feel like they need to star in their own blockbuster movie so they'll stay chilled until they safely bring the porsche to a stop.

Running a plate check here in the UK will provide the police with everything they need to know about the vehicle. Yes we do use mph to measure the speed of a vehicle.

Number Plate Recognition is in use in the UK and it does show uninsured cars. The cars are taken from the driver on the spot if there is no insurance.

UK Traffic officers are specialists.
They will avoid collisions until ready to close the box.

To start with in the UK we always use miles per hour,secondly our traffic officers do not carry guns and even our armed units would not shoot at a vehicle moving in traffic.They rarely use the pit manoeuvre, instead the TPAC is the chosen method of stopping vehicles ,our officers don't smash up their cars deliberately.You are even surprised when one of the police vehicles stops from running him over. All I can say is thank goodness we have calm police officers instead of the USA cowboys.

In the UK, If you refuse to take a breathalyser test, after being stopped, or after an accident, you'll be asked to give a blood sample at the police station, a doctor on call will do this, if you also refuse the blood test, it is assumed that you are over the limit and you would be prosecuted therefore, as driving whilst under the influence of drink (or drugs).  This usually results in a conviction for DUI and a fine, and your licence to drive suspended for 6 months or a year or whatever the judge decides is appropriate.

My brother in law was a fully trained and qualified pursuit driver based out of Coleshill, Warwickshire, he patrolled all the major motorways . He learned offensive and defensive driving in North Wales on those tiny mountain roads.
In truth the crims haven't got a chance. I also know a former helicopte police  officer. She used to do the tracking and commentary.

America is backwards in so many different ways.
How can you not check insurance by the plate

"yokSHIRE" is the most american thing ive heard this year

its said yorkshire (your k sher)

same with how worcestershire
is wuster sher

My nephew is currently a UK Police Interceptor & my uncle used to be a traffic cop. It's a highly skilled job. They have so much training to complete. In a professional career, you should never let emotions get the better of you & cloud your judgement. Anybody that can't be calm & unable to treat everyone with respect will not pass the tests to become an Interceptor. By the way, all cops have ANPR in their vehicles so they are alerted if a vehicle has been stolen or doesn't have insurance. ANPR is Automatic Number Plate Recognition. I used mange that system a few years ago for British Customs. It is an excellent tool for Police & Customs

Regarding the guy refusing to take the drug test, that's seen as being worse than actually taking the test and failing it. It's pretty much an admission of guilt AND perverting the course of justice on top of that.