A little puzzle for you...
On the left is a new tank which has just escaped from the paint shop. ICI supplied chlorine to Hayle in the early years before Ethyl/Octel had their own chlorine works at Ellesmere Port and there was a period during which both Octel and ICI tanks were seen together.
The tanks were made by different companies for different customers but both to the same RCH design, so they look similar but there are plenty of detail variations. No credit will be given for saying that the logos are different
And now for a slightly different puzzle. Spot the similarities!