I'm not sure what I am supposed to be concluding from this map. Is the claimed correlation between Parliamentarian or Royalist support and Leave/Remain? As an

I'm not sure what I am supposed to be concluding from this map. Is the claimed correlation between Parliamentarian or Royalist support and Leave/Remain? As an example: two Remain areas - Oxford and Brighton - one consistently royalist, the other consistently parliamentarian. Cornwall - supporting leave - consistently royalist, Kent - also supporting leave - consistently parliamentarian.