500,000
1
Royal mail has 176,000 employees..
36000 according to their website
British Gas employ 34,643 staff in the UK
Cheshire police employs around 3,500 staff members, including police officers, police staff, and support workers.
400
No limit. Very large mines may employ more than a thousand staff.
Royal Mail jobs offer many job opportunities such as postmen, drivers, sorters, and data imputters. Vacancies for these are listed and can be found online.
23 X 30 = 15n
As this industry is highly automated, most operations have a small staff. Roughly half of all poultry hatcheries employ fewer than five workers
There is no record of how many carpet cleaners Buckingham palace employs. I would imagine they have a lot.