Yes. The pound sterling is standard British currency throughout the United Kingdom. There are some stores that don't take currency from other "countries" within the UK, but most do.
Generally yes, though occasionally you will get some people who are a little reluctant to do so. They are Sterling currency, so they are legal tender in Northern Ireland.
Both Northern Ireland and Scotland use the same currency. The notes look different, but they should be accepted as they are legal tender.
In theory, yes. In practice, most shops won't accept it.
Yes. The Euro is the legal currency in the Republic of Ireland, so Irish people do use it. In Northern Ireland people use the pound Sterling.
The currency used in Belfast and the rest of Northern Ireland is the pound sterling, as Northern Ireland is part of the UK. if you are travelling from England, Scotland or Wales you would be best going into Your bank and asking for Northern Irish Sterling because some shops will take the English Money but others wont. Down in the Republic of Ireland they use euro.
Northern Ireland does not use the Euro. Northern Ireland and England use the same currency, which is Sterling. So there is no conversion rate.
US currency of course
They both use Sterling, so the answer would be yes. However, some outlets might refuse.
no northern Ireland's currency runs on pound, but you can still use euro in northern Ireland's
Potato
Yes you can use Scottish bank notes and Northern Irish bank notes in England. You may find it hard to get some people to accept them though in smaller shops for instance.
Derry is in Northern Ireland where the pound sterling is the currency.
They use pound sterling.
No, The Irish pound is no longer a currency. The Irish pound ceased to be a full currency in 2002 when Ireland switched to the Euro. In order to turn these into usable currency they must be traded for Euro at the Irish Central Bank in Dublin. A local bank in Ireland should be able to assist you with this. Note however that due to their discontinuation, Irish banknotes will probably return a small premium if sold to a currency collector.
We can't use it at the moment but the currency of England will possibly change soon.