The £30 limit does not apply to mobile payments. There's no limit for those. I've successfully made 2k£ transactions with Apple Pay.
Regular contactless limits are 30, otherwise the limit is much higher.
My highest was ~£1200 at an apple store, and I had paid a 500 deposit on a car, but it refused the 8K balance. So there is a limit somewhere between your 2K and my 8K attempts on apple pay ;)