Libya - money

[ilesmark]

Hi all

Not strictly an overlanding question, but I figured there would be enough people on this site who will probably know the answer.

I am asking this on behalf of a friend who is just about to start a TEFL job in Libya. He's getting paid in GBP, to a UK bank account. He's been told to take GBP in cash to Libya and change it into Libyan Dinars locally as required. I went to Libya in 2007 and carried USD cash and travellers' cheques. However, that was 2007 and I was travelling, for 1 month. So - for someone working there for a period of time:-

1) Is it better to take USD than GBP?

2) Cash or travellers cheques?

3) If he runs out of ££/$$ while in Libya, how to get more transferred to him from the UK?

Thanks

Mark