The information you've been given is very much incorrect. They do international payments - which are effectively the same thing. You may have asked for a wire transfer and confused the uneducated customer service person you got (easily done, they don't tend to be the sharpest knives in the block). I know because when I studied in the US for a while my Dad would send me money from his Barclays account on a regular basis.
http://www.personal.barclays.co.uk/BRC1/js...menu=3892#sevenvoila, all the information is on their website.
How do I send money abroad?
You could use our International Payments Service. This service provides a flexible means of sending funds overseas and has been specially designed to meet your needs in terms of cost and speed. Payments are sent using an electronic bank-to-bank transfer, which is suitable for both urgent and less time critical payments and enables the secure transfer of funds from the UK to overseas beneficiaries.
* Payments from sterling or currency accounts or against forward contracts.
* Payments in any freely traded currency, to virtually any destination (dependent upon Service Level chosen).
I think I love you

I think today may well be a day of maximum achievment !! I'll cancel my bulk order of valium * A flexible, reliable, secure and competitive service.
We have two levels of service. The one you choose will depend on how much you want to send and how quickly the payment is needed:
Standard service
For non-urgent payments to virtually any destination world-wide
* No maximum value
* Payments dispatched at the very latest on the working day following receipt of instructions by the bank.
Priority service
For urgent payments to virtually any destination world-wide.
* No maximum value
* Same day dispatch of payments for instructions received by the bank before 2pm
* Payments dispatched with earliest possible Value Date.