I do not know if there is an atm at Taba airport, but the following may be of use to you.
http://touregypt.net/teblog/tabanews/?p=6
The link below is to Visa.com and it has a global atm locator on it.
http://visa.via.infonow.net/locator/global/
From a quick check, there does not appear to be an atm at Taba Airport., but there are 6 locations within Taba itself.
Most Egyptian airports have a bank office open for flight arrivals/departures. The main ones being Misr Bank/Thomas Cook Bank.
Try a Google search for further information or a resort search. Bear in mind that it is more expensive to use Debit/Credit cards abroad (all the UK bank fees). I would advise taking Travellers Cheques, as you tend to get a better exchange rate and they are covered by insurance in case of loss or theft and quite easilily and cheaply purchasable in the UK.