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Roger Mills wrote in message
...

In the DETR booklet "Planning - A Guide for Householders" it says:
"If the work you carry out seriously overshadows a neighbour's window and
that window has been there for 20 years or more, you may be affecting his
or
her 'right to light' and you could be open to legal action."

If this applies to you, it may be worth having a word with your local
Planning Department - despite what others have said about right to light.

In cases where planning permission *is* required, there seems to be a 45
degree rule whereby, when looking out at an angle of 45 degrees from the
windows of neighbouring properties, your extension shouldn't be visible.
Clearly, this one would be!

Roger

No point talking to planning dept - it's nothing to do with them. And the
45 degree 'rule' is merely a rule of thumb (not law) used by *some* councils
to assess effect on light. Its based on BRE guidelines, but has no
statutory basis whatsoever.
The OP has no comeback through the council, basically.
Register a dispute.