MBNA credit limit increase and promotional 0% card purchase

Hi,

I got a question about my MBNA card.
Currently I have a promotional 0% card purchase upto March 2020, and at the time of application, my credit limit was £10,000. However, recently, MBNA has decided to increase my credit limit to £14,000, and my question is that whether the promotional 0% card purchase will be applicable for any card purchases made between credit limit £10,000 to £14,000?

I would have thought it should be applicable but just want to double check, as I am thinking of making a large purchase which will result the amount owed to be over £10,000, and I do not want to pay any interests if the promotional 0% interest rate is not applicable for amounts spent above £10,000 but below £14,000.

Regards
amsjrt