8.104 non-defining clauses

'When' and 'where' are used in non-defining clauses.

• I want to see you at 12 o'clock, when you go to your lunch.
• Dan's fondest memory is of last year, when the club gave a tea party for the Queen Mother.
• He came from Herne Bay, where Lally had once spent a holiday.
• She carried them up the stairs to the art room, where the brushes and paints had been set out.