Updating Tables From A Table Variable

I have a table variable into which I insert the results of a select statement. Based on the records held in the table variable I then want to update a field in one table and insert the records in the table variable into another table.

This works fine in a self contained test:

declare @table table(electionchangeid int)
declare @anothertable table(ID int)

insert into @table(electionchangeid) values(1036276)

update electionchange
set exportdate = GETDATE()
from electionchange ec
join @table t on t.electionchangeid = ec.electionchangeid

insert into @anothertable
select * from @table

But does not work within my sp .... (see next post).

It doesn't generate an error. It just doesn't update or insert any records. I would think that it was a scope issue, except that I can do a select on the table variable and see that it does contain records.

I would be very interested to hear people's thoughts on this.

Regards
Emma