Okay, I found it but it isn't really what I meant, it is a great idea to offer "Boot Repair" but what I meant was the normal terminal command like the following:
sudo update-grub
The only problem there is when I have tried the above command, it cannot find the correct path like this thread here:
My question is, why hasn't this been sorted as it is really old now? (I do realise that you are not responsible but someone at Ubuntu should fix this sort of thing!). 