By bharper@thekmgroup.co.uk (Brad Harper) A discount for under-25s at a new Kent cinema has left older movie fans frustrated and sparked claims of “age discrimination”. The Curzon in Canterbury is offering the tickets for just £5 – close to 40% off the normal off-peak price. Scroll down to vote in our poll One city resident voiced her frustration about the promotion after receiving a leaflet through her door. Susan Demir shared the flyer on Facebook, adding: “Just got this through the post. I don’t understand why I should pay £3.00 more because I am over 25? “How can Curzon do this. I thought …