Well after spending a number of hours going thought eh car today took the wheel off and found missing bolt on this. Could this of caused grumbling when going over uneven roads and bumps? Also I have tightened it back and also got new bolt for it off another saxo this afternoon. But it seems the top section to it wobbles. I took the top bolt out and seems the plate moves up and down is this meant to do this ? or is this meant to be right and not have movement in it ? Is this fucked or is it meant to have a little movement in it so that it can be moved about?

Bolt that is in the red square was missing.
After tightening everything up, theirs no movement with wheel on no play no con. But when am driving am sill getting the grumbling noise but not as bad since fitting the bolt back in. Could this be bearing fucked on it? or could it still be the main bushes that the axle sits on that need to be replaced?
Thoughts on buying refurbished axle and adding in powerflex? Would it be worth spending the extra on it.
Price to get bushes and to be fitted in current axel £170?
Refurbished axle + powerflex bushes + fitting £375?
Extra £205 hmm Decisions to make I am after a new car but still I want to keep this as its a good run around no other faults other than few small ones.
This VTS I have is on its 2nd Axle since buying original. One fucked after about 8 months of ownership and had scrap yard axle fitted that cost me £130 all in for fitting and has been fine up until now had 3 years use out of it without problem until I have had it hired from it being too low on bottom end and then found the above with one of the bolts missing. Could this of fucked the bearing up inside that is causing the grumbling when going over uneven road or could be bushes and might well go for recon?