I am in England, and I know I can visit Trinidad without a visa but only for 90 days.
Does anyone know which visa I would need to go for in order to stay longer than this?
I have looked at the official London Embassy website, but it is a joke, and does not help whatsoever.
Thanks.
Have you tried calling the Embassy of Trinidad & Tobago to get this information? This is not guaranteed, but I from experience that extensions are usually give to foreigners within Trinidad with valid reasons. In other words, when you are here you will have to apply for an extension rather than ask for it in advance, but I would call to clarify.
I don't think you can get one as a visitor for more than 90 days, you would have to see about applying through a student visa or work permit. But yes, I suggest that you call the Embassy and find out.