In article .com
, Trojan Hussar writes
Whilst it would appear I have no 'Right to Light' in the garden. This
does however raise the issue that my dining room and kitchen which are
already poorly lit will experience a loss of light. In view of the size
of the extension I strongly believe that the kitchen area will require
almost permanent artificial light with the possible exception of the
brightest sunny days.

I think there are Building Research Establishment guidelines for daylight
impact which you might want to google for. In Scotland you can request a
Daylight Impact Analysis so you may be able to request the same in your
area. Without such an analysis being requested and the results failing the
guidelines you won't have a leg to stand on, subjective analysis is just no
good. Also, I don't think the demands are that onerous so you probably
won't get far in any case, sorry.
--
fred