Whether or not it will work in Bedlington, I can't say but it can and does work in other places.
My nearest town for shopping is slightly smaller than Bedlington with just 15 000 inhabitants. It has three large supermarkets and has had since the arrival of Lidl some 10-12 years ago (a fourth did not survive). The two prior to Lidl had high prices because the majority of goods were Swedish. The excuse being given for this was that 'Swedish is quality' and 'the customer only wants Swedish'. However, along came Lidl with much lower prices and a range of non-Swedish goods that sold like wildfire because they were cheaper - giving low-income families the opportunity to eat until they were full and even have the odd luxury like an ice-cream once in a while (yes, we have those families here as well). Also, Lidl's range was different from the usual assortment making it easier for Swedes to try new things while those with an immigrant background no longer needed to travel 90km to buy familiar basics like dates, pollenta, tahini to name but a few items. My life would be complete if only they could start stocking shredded suet and split peas. We all miss something from home which allows us to make food we've grown up with.
The result was that the two previous supermarkets lost many customers to Lidl, which has now doubled in size. However, they didn't go out of business. Having seen what customers 'really' wanted, they started to think with their heads instead of their wallets and bought in some cheaper brands, one even created an own brand. Swedish items are now very few and today, those supermarkets are still alive.
Not only are they alive, I also believe that they are doing well. I base that judgement on the fact that all three, during the past 6 years, have doubled the size of their car parking area and they are all packed with cars Thursday to Sunday (popular days for doing the weekly shopping here). Of course, it may have helped that the town centre has had a re-vamp in recent years and that people are positive and helpful, making it a pleasant place to visit.