seat base

[andy66]

hi,the drivers seat base on my 203 has slight side to side movement when going round corners and makes an annoying clunk sound,i have removed the seat and tightened all fixings i could see but it still moves when put back in the car
does anybody else have this problem or have a fix
or shall i just put it down to wear and tear thanks andy

 

[television]

Is there no way that any of the fixings could be packed out, in the case of loose riveted joints some string pulled around the fixing can pack it out to stop excessive movement