Hi Andrew, thank you, that'd be very useful. Did any of Downey's designs include trinket sets please? This is my main area of interest and am always looking for more information about them as we've so many unanswered questions about these sets.
I also found a birth in 1911 of an Edwin William Downey in 1991 in Mile End London, who appears to have married in Dartford Kent in 1946 to a Doris Lucas, and who died in Bromley Kent in 1986. Does this sound like the same man? The dates would seem to fit with someone working at Vitrea in the 1950s...