Simon Calder claims that companies engaging in these transactions are betting on future exchange rates and that movements against them can wipe out profits overnight. That's ludicrous. Why would they take that risk? They fix rates using forward contracts which is why they're able to offer such seemingly superior rates.
Freezing a company's assets is certainly a pre-curser to a bank appointing a receiver, so I'm guessing there's a chance that may happen on Monday.
Forward rates are often significantly higher than spot. Contrary to popular misconception, they're nothing to do with a prediction of future rates: they're a simple mathematical equation based on spot with an adjustment for the interest (not exchange) rate differential between the two currencies.
to all invloved lets hope we all get the right outcome .Currency exchange site troubles
One of Britain's web-based retail currency providers is in difficulties, leaving customers wondering if they'll get the holiday cash they ordered.
Money Box has learned that Crown Currency Exchange has had its bank account frozen by Barclays to protect its creditors. Unlike most retail foreign currency dealers, Crown allowed customers to buy their currency up to a year in advance.
Money Box hears from one listener, Mark from Cumbria, who's still waiting for the holiday Euros he ordered from Crown Currency Exchange. The programme also speaks to Simon Calder, travel editor of the Independent.
Related information:
Crown Currency Exchange Statement
I feel awful that many people here have only used Crown based on recommendations from these boards (including from me). It's a sign of the times that companies are failing (big banks anyone?), but reading the MSE forum, there is a lot of 'if it was too good to be true, it was' and assuming the company was run by fraudsters who have committed criminal offences. I don't know if that is the case or not, but certainly we have used them for years, and they were a well established company that until now have fulfilled their obligations. That is the basis upon which I used and recommended them. Wayne has been a great ambassador of making sure everyone here was aware of the risk, and we certainly were. We only used them to top up our spending money (we have lost the £300 of change we save in a money tin, which is not the end of the world). 
to everyone, even those not affected who have been sensitive enough not to say 'i told you so'.