During the 12th and 13th centuries other traces were lost through major work creating the church we now see. Around 1180–1200, the south aisle was added and the south door moved to its present position. A tower with three storeys was built shortly after 1200 and by 1250 the north aisle was added. A further expansion took place around 1300, partly paid for by a legacy from Mr John Clarell, prebendary of Overhall (d.1295). The north and south transepts were added, the Chancel lengthened and, a few years later, the south porch built. Finally between about 1450 and 1500, the nave was heightened with a clerestory (a row of flat-headed windows) inserted, the transepts and Chancel were re-roofed and a fourth storey with battlements an gargoyles added to the tower. The 19th century, largely sympathetic, restoration (Chancel, 1857-8, rest of church, 1872-5) by Ewan Christian faithfully preserves St Laurence's medieval appearance. The only major structural change was that Christian restored the Chancel to its 13th century form by removing the low pitched roof that was part of the 15th century refurbishment.