Suriname requires British nationals to carry a visa that you must get before your trip from the Suriname Consulate in Amsterdam.
A yellow fever vaccination certificate is also mandatory for anybody entering Suriname via Guyana, French Guiana or Brazil.
On leaving Suriname you will have to pay a departure tax of $35 US or �27, please note that Surinamese dollars are not accepted.
If you require a Visa extension a passport and outgoing ticket must be presented to complete the procedure. Like lots of South American countries, the visa extension is almost always granted, but one must undergo the bureaucratic rigmarole that these procedures entail.