Hi Pauline,
For many years the hard currency in Cuba was the US$ but this was abolished in Cuba some years ago so you will now find there are 2 currencies there:-
- the ordinary Cuban peso which is the local currency that the Cubans get paid in and you are unlikely to come into contact with this, and,
- the Cuban Convertable Peso (referred to as the "CUC" which is linked to the $ and which you will be using on a day to day basis.
You can take Euros but if you are in the UK then take sterling which is readily exchangeable there. There is usually a large queue at the airport so as you will not need any cash straight away it is just as easy to wait until you get to your first hotel. Change as you go, rates are generally the same wherever, but some of the out of big town hotels may have shortages so change when you can & remember ATM's have yet to arrive everywhere.
Cuban currency is not exchangeable outside Cuba so if you have change left perhaps a mojhito to see you on your way!
Ian