Thought i'd check back in with an update.
So the sparky has come back and has advised that they can heighten the plug that is low to the skirting board. Would mean pulling a board, fitting an electrical fitting/box and extending the cable from there.
In regards to the lighting, they've discussed looking at the original kitchen light wiring to see if they can spot the issue. However as the issue only happened after the works my moneys on the new switches potentially bringing an old issue to the surface. So it seems a little fruitless.
In regards to the issue of my downstairs sockets tripping due to the use of my blender, there telling me that it's likely something i should learn to live with due to having older wiring. I mentioned about completing the downstairs socket so it could be upgraded from a 16amp circuit to a 32 amp circuit but was told that it could be a lot of work and not to worry about it and maybe consider it in the future if i knocked the lounge through.
And in regards to the outdoor PIR security lighting, rather than troubleshoot the current wiring, probably best to spur off a feed from an upstairs plug socket and run the security lighting from that.
After the last visit to explain all the above to me, they also replaced my downstairs WC light (which is also connected to the extractor fan just for info) And now i find that every 1 in 10 times i turn this light on it flips my downstairs lighting circuit.
Any advice?