margaret tyler , 71 , has been collecting royal novelties for 40 years .
the retired charity worker has amassed a collection worth £ 10,000 .
most of the items are novelties but there are more expensive pieces .
among them are a £ 1,200 wedgwood bust of the prince of wales .
collection is spread through four rooms , one of which is devoted to diana .
the ` memorial room ' includes a special ceiling fresco and stained glass .
margaret tyler appears on collectaholics , tonight at 7 pm on bbc2 .