I dont know if everyone else knows this and it was just me that didn't, but just in case its helpful
It wasn't until I sent for, and received a copy marriage cert of a couple who later divorced that I realised they put the details of the divorce on the back of the marriage cert (in Scotland anyway). I knew the couple had divorced, but not when and so was delighted to get this info from their marriage cert.
Also if you have an original copy (from when they actually married) of a marriage cert for a couple you suspect later divorced, it may be a good idea to send for a copy and then you will get the info.
Does anyone know if this is how it works with English Marriage certs as well.