Sorry Tanya, I have lost the details of the info I chased up on this as it was 10 months ago and did not end happily.
I remember I contacted other unrelated photographic companies in Ipswich to see if they had heard of them.
Eventually I tracked down someone who had, they gave me a name of someone who might know something.
After a lot of phone calls I discovered the company had changed hands and then was bought out by another company who were totally unrelated.
From them I discovered the negatives had been dumped in 1986 so there was no chance of me getting access to them.
I hope you are not having similar problems, but if so, I'm sorry to tell you they are gone for good.