In 1825, an imperial Order-in-Council was passed for the purposes of introducing sterling coinage into all the British colonies.
It wasn't immediately very effective due to unrealistic ratings, and it required a further Order-in-Council to be passed in 1838.
By the middle of the nineteenth century, Sterling coinage had replaced the Spanish dollar throughout all of the British West Indies.
In the Eastern Caribbean territories and in British Guiana, the dollar unit of account was retained in conjunction with the British coinage at a fixed rate of one dollar to four shillings and two pence.
Unlike in Bermuda, the US dollar circulated freely alongside sterling coinage in the Bahamas.