Thanks one and all for your input, a lot of ammunition should it be required.
Interesting point about use of radio aids, i see it appears on the srg2128 at item 3e as a requirement, but is not mentioned on the srg1157, the form used for the renewal.
As yet they have not asked for proof that radio nav. training has been carried out, (although far more at home with skydemon.)
After locating the Ratings page that they requested the other week, perhaps the clock is reset, and we have to wait a further 30 days for their assessment.