Don't make the mistake, that too many coppers do, of thinking they 'know' the Law. Your job is merely to uphold the Law; it's the Lawyers and Judges who administer and dispense it. The number of times I've had coppers quoting the Law at me, and getting it wrong. This is more the fault of the training though really. I think educational standards should be increased a lot for entry. A-level Law should be mandatory.
Be prepared to be met with hate, fear, suspicion and mistrust. It's a nasty job, but someone's got todo it.
How can you uphold what you don’t know? In order to do your job as a policeman you need a fairly good grasp of the basics of criminal law (particularity in crucial bread and butter areas of legislation such as PACE). Agreed it isn't to the degree of a lawyer or judge because as a policeman you are not conducting a trial or interpreting the minutiae of the various statutes. A policeman who doesn’t know his powers under the Acts would have his cases kicked out and in certain circumstances could be personally held criminally negligent/responsible.
On the issue of ‘A’ levels. That is utter piffle. If that were to be the case some fantastic, intuitive officers that I’ve worked with over the years wouldn’t have got in the job.
I've very rarely been met with hate, fear, distrust or suspicion from ordinary law abiding members of society – as it happens. Not exclusively, but generally, those feelings tend to be displayed by the criminals.
But in answer to the OP I would recommend it. Goods points – at times very rewarding, good sickness/holiday benefits, job security. Bad points – bosses that haven’t got a clue about policing, high stress, pernicious Government schemes/targets that inhibit proper accountable policing.
If you are going to apply, be committed, don’t just give it a go. You must WANT to do the job, otherwise it will find you out and your tenure as an officer will be a short one. In recent years I've found that many recruits join to see if it's something they can turn their hand to (usually equipped with 'A' levels) and discover a year down the line it's not for them.
All the best.