Downing Place United Reformed Church occupies the former St Columba’s building in Downing Place, which was built in 1891 in the Early English style and stands within Cambridge's Historic Core Conservation Area. The site has been extensively renovated as part of a £3.3 million project led by Archangel Architects into an open and inclusive church, and community centre. The central hall has been converted into a double-height community hub, along with meeting rooms on two levels. Wherever viable, measures have been taken to make the Church more energy efficient, including the insulation of the historic fabric, photovoltaic panels, and thermal window upgrades.  After Coulson Building Group had repaired the original windows and prepared the reveals, 56 units were installed; comprising of four Series 45 side hung casements in the Chapel and 52 Series 46 slimline fixed lights installed in the Nave.  A large circular primary window in the Nave was perhaps the most complex treatment due to its shape and elevated position. Having previously worked on a similarly large circular window, a timber mullioned cartwheel frame was crafted to securely hold the secondary glazing. Seven bespoke Series 46 fixed light segments were made for it and glazed with 6mm toughened glass to give additional rigidity and structural strength.