Also, if you have already paid your 2022 Walt Disney World tickets in full (or plan to pay them in full before November 2nd) the ultimate tickets will be honoured. If you have only put a deposit down, you will have to pay the balance before November 2nd or they'll be rolled into the new "Magic Tickets".
At the time of writing, pricing has not been announced for these new tickets (I'll leave it up to you to guess if they'll end up being less). The prices of the new "Magic Ticket" will vary depending on the time of the year, it won't be one set cost like the "Ultimate Tickets" have in the past. So, you have two options before October ends if you're looking to buy Disney World tickets for 2022.
Before the end of October, you book and pay for the current "Ultimate Tickets" in full for 2022 now and have the flexibility to use them at any point during 2022. By doing this you lock in and pay the price they currently are and won't be subject to the seasonable price adjustments that will be coming. This applies to tickets bought direct through Disney or through a UK ticket vendor.
You buy "Ultimate Tickets" for 2022 now and pay a £20 deposit through UK ticket vendor (you cannot do this option direct through Disney) which guarantees the price they are set when you put down the deposit. They will be automatically rolled into the new "Magic Tickets" where you have to declare the first day you will use them, but you're guaranteed the price of the ticket will remain the same as when you put the deposit down.