As I've said in the last two posts, you simply need a passive crossover, have a look at https://www.colomar.com/Shavano/crossover12db.html, in particular the first drawing on the page, the top half of the drawing "wired as seperate speaker systems".
Just in a circle, a popular winding former is a brush handle :lol:
As you're in Cheshire, there's a company called Wilmslow Audio, who used to be in Wilmslow, but I think are now in Stockport?. They have been major speaker suppliers for many years, and sell components to make crossovers, if you're not far away, it might be worth getting in touch?.
According to AutoRoute, Northwich to Stockport is 21.9 miles, and Northwich to Wilmslow only 19.3 miles - both distances by road, not as the crow flys.
Although I appreciate that you are probably too young to drive?, and it would be more difficult.
As you have Maplin, they sell passive crossovers as well!.
Maplin definately use to sell 2 and 3 way crossovers as kits so maybe worth a look they certainly sell ready made inductors and all the bits required to make your own!
Hey Nigel - you just took me down memory lane Big time! I 'served' my work experience at a service / hifi shop in wilmslow and I remember going out to Wilmslow Audio with the tech for some drivers once - Anyway thought I would do a search and found this... https://www.wilmslow.org.uk/wilmslow/hifi/hifi.html
The first shop that guy talks about is where I put a fair amount of my (free) time in my early days! really quite enjoyable despite being the company 'guiney pig' on more than one occasion :roll:
Oh and Wilmslow audio now in Leicester of all places so I think daniel is really stumped :lol: