World cruise is a great idea and would definitely need to be thoroughly researched for the right ship. We are still trying to find ‘the one’ for example Love the entertainment on Royal Caribbean, service & food on Princess and Cunard, convenience of P &O but find that they serve fish and chips and cottage pie whichever destination you are going to and wouldn’t want to do that around the world. Norwegian is great value …
So I guess that the multiple lines depending on destination is for me
thanks everyone for their input , it has helped to clarify for me the way forward