"sending jobs overseas" is as much, or possibly more, the "fault" of retailers and outlets, not the companies themselves.
E.g. kitchen appliances. UK used to have a lot of their own manufacturers. Now they don't. Now, kitchen appliances are not a thing any end user buys from the manufacturer straight off, they barely buy from wholesalers. They're things that people buy from retailers. And that's where it starts.
Kitchen appliances are durable products, and people generally only buy them on a few occasions, such as moving out of parents house, getting married, getting divorced, and when the device is no longer serviceable. (We have a blender that is older than I am, for example. It still runs fine.)
As a result, they make ideal gifts. And gifts get purchased at Christmastime. And that means Christmas sales, and big, big discounts! Seriously, it is something like 90+% of kitchen appliances are sold in Dec/Jan in the UK.
This puts pressure on the retailer to obtain quality appliances at low costs, so they can compete with the other retailers. So, they talk to the appliance manufacturers, looking for a good deal.
And, because appliances are not something you just wander up to a factory and purchase one of, retailers have a stronger bargaining position. Manufacturers have to sell to them.
This then puts pressure on the manufacturer to lower costs. But there's a limit as to how low it can go.
And that limit is when Transport Cost of Import < Difference in Labour Costs. There's a point when imports become cheaper than locally made products.
And because of competition between retailers, they'll go for the imports. They have to, or go bust.
Manufacturers then either go overseas, or go bust.
the various campaigns by governments to "buy British" are ineffectual, because people just do not want to pay more for their products, even though it means less jobs for UK people.
And there's not a lot you can do about that.
There are comparitively few jobs that cannot go overseas. Construction (even then that can be done by migrant workers), logistics (moving products from ports to warehouses to end users) and maintenance (of infrastructure, of buildings, of products, healthcare can be included). Everything else, is importable.