Thanks to everyone for the advice & suggestions - even the one about
laying off the caffeine. :-)

My 'Oh Sh*t!' reaction is pretty typical for me - find something
unexpected and think the worst, then investigate/ask questions and
find out it's not as bad as all that! And a good night's sleep always
seems to put things in perspective

We're currently awaiting the visit from the inspector and we'll just
have to see what he says about replacing the wood - if we have to do
it, we have to do it! Could do without the extra expense though!

Thanks again to all who responded.

Perry