Right - I am returning to say that i misread the letter i got (possibly due to tiredness and irritation and all round feeling frazzled)
I can take all my stuff to the local jobcentre and they can deal with it.
[shuffles abashedly..... changes personal default setting from 'blow up' to 'read things properly').
I shall say nothing about the fact that I am a solicitor who failed to read the small print....