The window was produced by William Warrington in 1847.
Angels in the tracery hold shields representing both the Passion & the Evangelists Luke (winged ox) and John (eagle).
In the main lights are depicted (left to right):
Top Row: the apostles Thomas, Matthias, Simon & Thaddeus.
Bottom row: Bishop John of Oxford, Bishop Middleton, King Edward I & King Henry VII
To see more detail place your cursor over the highlighted panels in the window.