- SPS Timber Windows (Address: 61 Revelstoke Rd, London SW18 5NL)
Location: HarrowCategory: Windows
Location: HarrowCategory: Windows
- Mortice & Green Richmond & Twickenham (Address: Suffolk Road, London SW13 9NA)
Location: HarrowCategory: Windows
Location: HarrowCategory: Windows
- Abstract Windows (Address: 2b, Field Road, Watford WD19 4DR)
Location: HarrowCategory: Windows
Location: HarrowCategory: Windows
- Pane & Simple Ltd
Location: HarrowCategory: Windows
Location: HarrowCategory: Windows
- Mortice & Green South London (Address: 12 Balfern Street, London SW11 3EL)
Location: HarrowCategory: Windows
Location: HarrowCategory: Windows
- ORIGINAL WOODEN WINDOWS LTD (Address: Dutton Farm, Bangors Rd South, Iver SL0 0AY)
Location: HarrowCategory: Windows
Location: HarrowCategory: Windows
- Sterling Windscreens (Address: Square Orchard, Breakspear Rd South, Uxbridge UB9 6LS)
Location: HarrowCategory: Windows
Location: HarrowCategory: Windows
- BARNET WINDOW CO. LTD (Address: 39 Bulwer Rd, Barnet EN5 5EU)
Location: HarrowCategory: Windows
Location: HarrowCategory: Windows
- Classic Glass
Location: HarrowCategory: Windows
Location: HarrowCategory: Windows
- Heritage Restoration (Address: Old Chapel, 29, New Rd, Brentford TW8 0NX)
Location: HarrowCategory: Windows
Location: HarrowCategory: Windows
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