live from london, this is bbc news. in france traditional may day celebrations are being used for mass demonstrations against the increase in the pension age. these are pictures right now from paris. police right now from paris. have fired tear gas against some police have fired tear gas against some protesters following clashes. and nurses in england say they are holding their biggest strike yet as nhs bosses warn patients to expect disruptions. humanitarian organistaions plead with rival military factions in sudan to stick to the latest ceasefire and protect aid workers.