Is England a first world a second world or a third world country?
It's a first world country
Is France a first world a second world or a third world country?
Is the UK a third world country?
No. The United Kingdom is a First World country.
Is Monaco a third world country?
Yes, in the sense that it is a non-aligned nation, although a defence agreement is in place with France. As far as being Third World in the current sense of the word, however, no.