Today I looked at paper in Falkiners fine papers it's on Southampton Row, very close from school. I have purchased Bio prima book paper 85gsm. They're ideal for making books and printable on both side. Tomorrow, I am going to Service Point to print all the pages out, as they have to be exactly in the right position on each page for the diary book, and it's going to be a large almost of pages so I can not do it at home, I also need to find out how to bind them together to make a proper book.
Below are some picture I found of tutorial of how to bind books



Oh, by the way, here's the name and contract details of the paper shop in case you'd like to know,
Shepherds Falkiners
For Fine Paper& Bookbinding Supplies
76 Southampton Row
London WC1B 4AR
020 78311151
store.falkiners.com