There was no region 2 release of The Pagemaster
There are 2 ways around this, both involve buying the US dvd
1 Recode the DVD player as the Doc says, I guess he would guide you on that.
2. Buy a multi-region dvd player if you are certain yours isn't already.
ALSO most dvd regions will work on your computer or laptop, so buy the disc,that way you know there will be a way of watching it, other than that there was no UK release