It sounds as if the wall lights might be connected at the ceiling rose as they work with main light, check how many red wires go to the flex connections, there should only be one from the switch, which may be a black wire marked by tape or sleeving, to confirm the other flex connection should be blue with two or more blacks to it.
also count number of reds connected together but not going to flex ie looped in, repost with info, will try to help,as said by doc don't cap off and bury wires, someone else won't know
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