Hi we're travelling to Spain in a few days.Is it better to exchange our money within the UK (exchange rate today is 1.27 at the PO)or we will get a better exchange rate within Spain?If so,can anyone advise if its better to change at Malaga airport or other?TIA

https://uk.finance.yahoo.com/

At the moment Yahoo are showing just over 1.40 therefore in the street in Gibraltar ( not Spain ) I would expect to get 1.38+

Pounds to Euros (GBP/EUR) and Euros to Pounds Currency Converter. ..is showing 1.40..

Doubt that any airport exchange place will be better than a bank/PO.
Most I know use their card (not credit card) as some nowadays give very good rates with very little commission (Halifax have a card with no charges)

No need to carry money around so it could be safer & if you go this route always select Euros & not GBP on the screen.

Use an ATM and run the risk of the card being read ? I prefer a pocket full of cash !

I always use the one inside the Bank..

Yes. That is safer ! I would be very wary of using an ATM in the street - ANYWHERE. These Lebanese Scanners are everywhere now. That is the "racist" name given to the photography devices clipped onto an ATM.