curvy front disc poss prob

when i was cleaning the old girl, getting her ready for the first ride of the year.

i found that one of the discs has a rattle not side to side but forwards / backwards.

did a serch and this seems to be a regular problem.

but what i need to know is will it be a MOT fail for this?

got mot at the end of april so would like to know if i need to spend more money on it

thanks

stew

if its loose on the bobins ,and the discs arnt worn thin ,it will still work ok and last for years,and i have never herd of the disc falling of the bobins,my old gsx600f had about 4mm play backwards and fowards and about 2mm sideways, and only replaced them because i had a spare new set in stock whitch i got with the bike,and it should not be an mot failure