Variation of Condition 2 (Plan numbers) pursuant to 21/2630/FUL (Part single-storey, part two-storey rear extension; loft conversion including rear dormer and front rooflight; single-storey side extension following demolition of an existing outbuilding; front porch; and alterations to frontage including widening of existing vehicular access) to allow for alteration to the roof form, alteration to fenestration and removal of a chimney