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Sounds like a bonus. It also sounds like you are going to struggle to get a good edge on your blades. It is an activity that is not for everyone. You could always use the services of someone like Ital Cutlery. They're based in Brockley which I believe isn't too far from you. They have a knife collection service. I've never had the need to use them, but they've been at it for 30 odd years and get good reviews.
I recently pointed someone else on here in their direction.
Make it someone else's problem.
I agree, £250 is too much. I've probably spent about £100 on sharpening tools which didn't seem to work for me, including a Lansky Turn Box and a Vulkanus. Probably my fault, as I'm not good with tools, metalwork, jewellery making and so on, and I'm impatient. The Blenheim Forge course and a pair of stones would have cost another £100, and to my mind there was no certainty that I'd get things razor sharp, which is what I want.
Every bladed thing I've ever bought in my very long life has gone blunt, and I've never got a single one of them back to 'as new' sharpness. So the £250 I've just spent has eased my frustration and given me a sense of relief. And at least I can sell the Wicked Edge for at least as much as I paid for it. Not that I would. But it's comforting that I got a good deal. (The seller advertised it as a £612 Pro Pack 1. I didn't discover it was the £839 Pro Pack 2 until I unboxed it.)