If Aldi is in Scotland like it's in germany, then you might try to sample the no-name-ketchup wether one of it actually is Heinz 'incognito'.

In germany Aldi stocks a lot of no name products that acually are produced in the same places, with the same recepes as the "real brand", just without the big name.

Some of this might be of slightly 'lesser quality' than the branded products. But often the company wants to sell excess product or do not want the customers to relize, that they are usually charged to much for the brand, so the company ist glad to sell the same product no name of less money.