Not really. The guys in the hats are usually the ones who patrol in cars while the ones in the tall helmets will usually be on foot - they are becoming an endangered species.
I would say that ‘cops’ is the most common name for police officers (the official gender-neutral name). Old Bill, rozzers, pigs, fuzz, Filth, Bizzies (Local to Liverpool), and Plod are all ones that come to mind.
Well, there are two separate police forces in London - the City of London Police and the Metropolitan Police. I guess, as Robert Peel was instrumental in establishing the Metropolitan Police, it is only that force which, strictly speaking, should be considered ‘bobbies’. This is not a distinction I’ve ever noted though - any police officer in the UK might be referred to as a bobby. It may have a historical veracity however.
No, not true. They are the same Police, but you can’t where a traditional police helmet in a car, so the checkered cap is a compromise. The same Police would still wear the traditional helmet on foot, or on parade. Bobbies also doesn’t refer to the helmet, it’s just a nickname for the Police.
Police in Scotland no longer wear the traditional helmet.
No, rates weren’t only paid by people who owned property. Tenants paid them too. The problem with poll tax was that 4 very low income working people living in an overcrowded one-bedroom flat were charged twice as much as a millionaire couple living in a mansion despite the fact that they don’t really use four times as much in services. Council tax now gives a discount for a person living alone so it does take number of people into account somewhat.
Rozzer is still used, but not by anyone under 50 unless they’re being ironic. I mostly hear kids saying 5-0 (five-oh), feds, po-po, or occasionally the bill, which is odd because it’s a pretty old term. But they do say cops too, and occasionally copper. Never bobbie, peeler, or rozzer.
The most noticeable difference between the City of London Police and the Metropolitan Police is that the City cops have red and white checks on their hats while the Met have black and white. There are around 900 officers in the City police and 31,000 in the Met.
As said rates was a tax paid by a household to the local council, for local services, and was assessed on the rental value of the property. Rates were replaced by the extremely unpopular community charge (poll tax) before that itself was replaced by council tax, which is assessed on property value.
“Copper” and “bobby” are both still used in the UK to describe police constables, but “bobby” often has quaint connotations.
There are plenty of different slang names for the police, some local/regional, and each with their own associated aura of social attitudes. I think “bobby” does imply the old-fashioned “woodentop” or “PC Plod” pounding the streets (as, by and large, they don’t these days). “Filth”, “rozzers” “Old Bill”, “busies” (as in Liverpool-set TV shows at least!) or “PO-lis” (as in Glasgow equivalents) all sound a bit forced and comedic. I think “cops” and “coppers” more approach neutrality, as it were. I think I’ve heard of da yoof using “feds”, US-style.