Is the bracketed section (Most likely will happen...) your addition or copied from the site because that wasn't there before.
EDIT it's your addition. They have revised the whole pre order page again with further info indicating they intend to charge more when the items arrive. None of this 'Transparent Cost Confirmation' was transparent before and is now retroactive after everybodys preorder.
It seems they completely messed up on pre-order pricing and charged people a correct amount - They now realise that in the current market they can scalp.
So they will most likely increase prices and make sure everyone who has pre-ordered is charge an extra few hundred to receive their card.
TBH I am not a solicitor but pretty sure what they are doing is not legal - As thought that any things like this should have it clearly marked when purchasing the price and money taken isn't the final amount and just a pre-order holding.
I didn't see any mention of this when pre-ordering and it was a policy brought in a couple of days later when the pre-order page landed.
This is their new policy:
Our Commitment to Fair Pricing
Your final pre-order price is influenced by several key factors:
1 We maintain normal margins without inflating prices during shortages. You can compare our prices with the market to assess the fair value. (When companies are charging £3000 for a standard Palit - Is that considered fair value?)
2 As mentioned, our final buy price is confirmed only after dispatch, based on the prevailing exchange rate. Your pre-order price is therefore an estimate until then as exchange rates are volatile.
3 Our long-standing relationships with board partners and NVIDIA ensure fair allocations and support our “Order with Confidence” pledge to our customers.
4 Your pre-order secures your place in line, and we stand by it as a firm commitment to delivering genuine value.
Overclockers might be charging more per card, but least they aren't going to send you an email asking to pull your pants down and bend over whilst they charge an extra few hundred quid on your pre-order.