Working out how much a company is worth?

[twoblacklines]

I am using this company purely as an example.

Say I decide to get into industry x and rather than create a new company it might be easier to buy one that already does what I want to do.

See company "TURBO DYNAMICS" here https://companycheck.co.uk/company/02769439/TURBO-... for their financials.

Given those figures, how much is the company worth when a private individual buys it? What sort of ballpark offer would need to be made? Assuming that their factory is owned by them with no mortgage at the current figures.

Thanks!