Thank you very much for the advice everyone; I am now a little happier
knowing that I have not ruined it on my first attempt.

It sounds like the worst impact of this is that It wont produce as
much alcohol and I need to fortify it later on; which is a million
times better than the situation that I feared.

Thanks again.

Steve.

n.b.

Does anyone know the formula for calculating the alcohol content if
you dont have the original SG, thanks.

Steve.