[Government of the United Kingdom](https://en.wikipedia.org/wiki/Government_of_the_United_Kingdom)

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> The Government of the United Kingdom, domestically referred to as Her Majesty's Government, is the central government of the United Kingdom of Great Britain and Northern Ireland.
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[Ministers and departments](https://en.wikipedia.org/wiki/Government_of_the_United_Kingdom#Ministers_and_departments)

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> As of 2019, there are around 120 government ministers supported by 560,000 civil servants and other staff working in the 25 ministerial departments and their executive agencies. There are also an additional 20 non-ministerial departments with a range of further responsibilities.
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What is the minimum salary possible in a [Her Majesty's Government's](https://en.wikipedia.org/wiki/Government_of_the_United_Kingdom) Department's job?

Think of supervisor, clerks, cleaning personnel, guard, anything. Which "pay grade" gets the lowest salary and how much is it per month?

I do not need information of casual, contractual employees. By employee, I mean someone working till retirement unless of course they retire before retirement.

Optional note. Special allowance given to any particular department like (say, police, just example) may be ignored for the time being. I assume it is given to particular departments. The police cleaner might get some extra allowance to maintain uniform. While, a cleaner from other ministries might not get it. It's an imaginary example.