Matt, a multi-crew restricted medical means that you can only fly commerically in a multi-crew environment. In other words, you cannot operate a commercial aircraft solo. This means that you would be permitted to fly for an airline, but you couldn't fly a small turbo-prop commerically, for example, if you were the only person up front. However, re-reading your initial post it would appear that you have never had an epilectic fit(?), so I think that you have a good chance of gaining an unrestricted Class 1 in any case. As others have suggested, it is definitely worth contacting your local AME for further advice. A list is available from the CAA's website here:
Medical Examiners Database Search | Medical | Safety Regulation
All the best, jez