Code under the cistern lid of the White toilet range is usually E4.
Note: The hinges on the seat were manufactured/changed differently in 2008. If you have a seat and hinges installed pre 2008 then then the spare hinges that fit this seat will not fit your older version and the only option is to purchase this new seat with hinges.
The hinges to fit this post 2008 seat are our SKU FTB1002 here.