What would you use for currency if only in London 2 days? Euro,pound or dollar?

Are you under the impression that you have a choice? The local currency is the GBP, and only the pound.
Do you have a choice of three curencies at home?

If you were in New York for two days, would you expect the pound or the Euro to be accepted?

The currency in London is the pound.

You can use ATMs to get pounds.

You aren't going to have a choice, be prepared to use the British Pound.

>What would you use for currency ..in London.... Euro,pound or dollar?<

The Molvanian Phlagtog. You get the best exchange rate.

In spite of the advice you have received from the posters above, I would like to offer a contrary view:

I think you should use British pounds.

But why limit yourself? There's a whole world of currencies out there. Australian, for a start - the notes are made from an interesting polymer material, come in a range of designer colours and are very difficult to counterfeit.

Oh, I just realized the OP asked about currency for TWO days!
I thought it was for three days!

But I heard the Phlagtog had been devalued recently - and they're now using Monopoly money in Molvania. I'm sure it would work in London too.

Monopoly money?? Are you kidding??

Why, in London just landing on Boardwalk would cost you about -- oh -- 100,000,000 monopoly dollars.

I'd be embarrassed to admit on this board what we paid to stay on Park Place last year. Of course, it's somewhat cheaper if you do not pass Go.

But you don't collect $200.

ira and nytraveler are having you on with all their talk about the Phlagtog. The Molvanian unit of currency is still the Strubl. 100 qunts = 1 strubl. Don't believe anyone who tells you otherwise.

How about Confederate Dollars.

They are worth more on e-Bay than legal tender dollars of the green variety.

You might try some old Irish punts or whatever they were. A few fiche punts notes will get you a nice room with a view.

Well if you're going to insist on Phlagtogs and Stubls, then you might as well use sous, farthings,shillings, and
two dollar bills.

That's true - the Phlagtog was recently devalued. But Molvania is bringing in the renowned financial experts Professor Eustace P McGargle and Dr. Egbert Souse in to straighten things out.

How about the yen?!?! Are you joking or just EXTREMELY naive? And why would the number of days that you are in London make a difference?

While a lot of us are making fun of the OP, it is an example of the ignorance many have when travelling and I am afraid that Americans are the worst offenders.

I have met more than one person who was told by a bank official in the US that when travelling to several European countries and including the UK, it is best to take only euro as they are readilly acceptable in the UK and not bother with sterling.

I have read travel guides which suggest to Americans that when they don't have local currency, that it is perfectly acceptable to tip in USD and that it is a universally accepted currency (of course that was before the free fall of the USD but that's another story so to speak)...and of course there is always the odd ball American who when told a price in local currency utters the all too familiar and sickening comment, "How much is that in cash?"

So it is understandable how people being misled can become so confused.

Neither..Credit cards! Do some calculating. You may be better off bringing dollars from the USA and converting them to pounds. This will avoid the NEW 3% conversion fee.

It's been reported that a passenger off a cruise ship that docked in Sydney last December (see below) asked a waiter "How much is 10% of Australian dollars? I could work it out if it was 10% of American dollars!" At least she got the message that in Australia you don't tip more than 10%, and usually not at all.

Allegedly her friend chimed in with "Is it ALWAYS so hot here in winter?" Well, the International Date Line is a bugger, isn't it.

Seriously, the OP may be a troll. Let's hope so.

>Well, the International Date Line is a >bugger, isn't it.

An Australian friend swears blind that an American exclaimed "don't they have Thursday in Australia?"
It's the same as these religious types who announce that the end of the world will occur on a certain date.

Anyway, in case the questioner is not a troll: there are lots of places in London and even outside e.g. at National Trust properties where they will accept Euros. I think that some big shops will also accept USD. Just don't expect a brilliant exchange rate.