Thanks I shall be checking as you stated.
The last mot was 1005 miles ago and nothing was mentioned. This year (same garage) new young tester. I had to explain the suspension to him ! To be fair he demonstrated the play to me and left it as an advisory.
Also with respect to RT
I didn't own the car for the 4000 miles after the work was done.
So don't know how the last owner drove or maintained the car.
If you drive in potholed cities in the gutters up and over road calming measures the fns will take considerable wear.
I have a year to resolve it.
Thanks for all the advice
It will be sorted before the next mot

PS
I shall NOT be using any dealers other than for spares supply. In the last 45yrs I've owned and restored 150 plus classic bikes and 15 plus classic cars. Kingpins are a dirty but simple job in the grand scheme of things.