After a lot of research I have deduced that it cannot be deleted. You either spend £££s to eliminate warning light, or live with it.
Choices then are aftermarket monitor that uses valve caps (£30-£100) or good old fashioned tyre gauge reader.
Thought I was onto a relatively easy solution in reading the TPMS codes when tyres were off for new ones, in order to input via Techstream, however some senders were already aftermarket and had no code written on them.