One of the reasons why you need to be careful how you send money abroad from UK is that exchange rates change from time to time. Therefore, it might be most cost effective sending money overseas on one day than on another. Foreign currency brokers, and other companies who specialise in sending money abroad, will most likely have a good knowledge about foreign currency and be able to advise you as to the best times to do this.
You might be wondering what are the factors that affect currency exchange rates?
Political factor may be an issue. This is more of a problem in some countries than it is in others, and unstable political climates can undermine the strength of a currency.
Inflation is usually related to the strength of a currency. The lower the rate of inflation generally speaking the stronger the currency, and vice versa.
Current account deficits might also be an issue. Practically speaking, this means a country is spending more on foreign trade than what it earns, and this can undermine the value of a currency too.
There are other factors in play as well. The point is that there are so many determinants of a currencies value that it is hard to predict how much a currency will be worth from one day to the next. This is why it often pays to seek the help of organisations who are specialist in sending money overseas.