I am new to sailing and want a sailing dinghy for my first boat.

I am specifically after a boat that can be sailed single handed. Preferably
one that is NOT made of wood so it is easier to look after. It must be light
and easily transportable as I want to take it around the country (UK). I
must also be able to get it in and out of the water myself if necessary.

It would be nice to have a boat where I could take at least one passenger,
but this isn't vital. A boat that is also fast would be nice, but again it
isnt critical.

I know I am not asking for much but can anyone suggest some sailing
dinghys that would fit the bill please?

Thanks in advance,

Mike