I got the same email, I am guessing it was just sent out automatically by accident.
I have a Plaid X on order with 7 seats, also at £121k.
If you take the US price, add VAT and import duty and convert it to GBP, the new price is still more than this. the current EU price is also more than this.
In France and Germany, the price for the Plaid X is E20,000 more than the LR. In the US, the Plaid is now just $10,000 more than the LR and includes 6 seats, adjusting for that it is bizarrely only $3,500 more than the LR. I don't think EU S and X prices have fallen, but they seem about right as they were actually lower than US prices adjusted for VAT and duties when pricing was reintroduced. In fact the LR is still cheaper than in the US.
Personally I feel that Model 3 and Y pricing is now around the right level, but S and X are still too expensive. They are still considerably more expensive than they were two years ago.
As an aside, I have been looking at the EQS SUV as an alternative to the X. In the US and Europe, the base EQS SUV is available for a couple of thousand more than the base EQS saloon. In the UK the cheapest EQS SUV is £24,000 more than the saloon. This is due to the compulsory addition of an expensive option pack in the UK. I think that many car makers have indulged in very aggressive pricing in the last year due to shortages and will soon find that this is unsustainable. The EQE is considerably more expensive in the UK than elsewhere, I suspect the pricing has been set by the high price of the Model S.
I don't know how all these moves impact the introduction of RHD Model S and Model X. On the one hand it seems like an easy source of extra sales so they may come a little sooner. On the other hand, I am not clear how disruptive it is to the production line to switch over to RHD and maybe they prefer to sell more LHD cars at lower prices.