Is there anything to remove biro from leather ?

[Kaysleighbells]

Just noticed a long blue biro mark across my pink filofax cover. Can't even blame my boys - it was clean when I left for work this morning. It must have been me
Will anything remove it ?

Hairspray
Baby wipes
Nail Polish Remover

well i have all three of those at home so will give them a try this evening - will let you know how i get on

Hairspray worked on our leather sofa but don't over do it because it dulls the leather.

Ours went a little bit dull, so I rubbed vasaline over it and it looked fine then.