Are new Royal baby stamps a good investment for future?

A new set of stamps to mark the birth of the Royal Baby went on sale on Wednesday.

However, the Isle of Man Post Office has only produced 500 sheets of the stamps - which could mean they are worth more than their face value in the future.

Premium rare stamps have their own index which since 1995 has delivered better returns than gold or the FTSE 100.

Stamp dealer Tony Bray told BBC Breakfast that rare stamps are not always expensive - but a Swedish stamp had recently gone for "millions of pounds".