Could almost be any of Ysart Brothers (Vasart), Vasart Ltd or Strathearn.
But I think it is less likely to be the early period (1946 to 1956) and more likely a "transitional" piece from the later Vasart Ltd to the earlier Strathearn years (possibly something like 1960 to 1969).
If you could check it with shortwave uv, it would show whether it is the earlier period or Vasart Ltd / Strathearn. But without that check it's hard to be sure.