Metal Markers

I have seen the odd metal marker here and there, and they are usually rusted with no remaining trace of who they belong to.
Then on my way home, I did a quick detour and found this quiet little cemetery in the village of Ickleton in Cambridgeshire. It has the biggest selection of metal markers I've seen all together, including one which has recently been restored. I do not know if they would have been simply painted in black and white as this one has, or whether they would have been more colourful and was this style due to fashionable trends or because of financial considerations ?.......