UK Car Repair: peugeot 306 1.9 turbo diesel, peugeot 306, oil gallery

Question
can you tell me why i have got oil in radiator thanks

Answer
Is it engine or transmission oil?  Which one is low on oil?  The usual cause is  a leak in the oil cooler, check and see if your car has one.  If not, the next potential cause (although unlikely) is an internal engine leak between a HP oil gallery and a water gallery. And of course it could be that someone put oil in the radiator!