Act, an estimated 50,000 Protestant Walloons and French Huguenots fled to England, with many moving on to Ireland and elsewhere. In relative terms, this was one of the largest waves of immigration ever of a single ethnic community to Britain. Andrew Lortie (born André Lortie), a leading Huguenot theologian and writer who led the exiled community in London, became known for articulating their criticism of the Pope and the doctrine of transubstantiation during Mass. Of the refugees who arrived on the Kent coast, many gravitated towards Canterbury, then the county's Calvinist hub. Many Walloon and Huguenot families were granted asylum there. Edward VI granted them the whole of the western crypt of Canterbury Cathedral for worship. In 1825, this privilege was reduced to the south aisle and in 1895 to the former chantry chapel of the Black Prince. Services are still held there in French according to the Reformed tradition every Sunday at 3 pm. Other evidence of the Walloons and Huguenots in Canterbury includes a block of houses in Turnagain Lane, where weavers' windows survive on the top floor, as many Huguenots worked as weavers. The Weavers, a half-timbered house by the river, was the site of a weaving school from the late 16th century to about 1830. (It has been adapted as a restaurant—see illustration above. The house derives its name from a weaving school which was moved there in the last years of the 19th century, reviving an earlier use.) Other refugees practised the variety of occupations necessary to sustain the community as distinct from the indigenous population. Such economic separation was the condition of the refugees' initial acceptance in the city. They also settled elsewhere in Kent, particularly Sandwich, Faversham and Maidstone—towns in which there used to be refugee churches. The French Protestant Church of London was established by Royal Charter in 1550. It is now located at Soho Square. Huguenot refugees flocked to Shoreditch, London. They established a major weaving industry in and around Spitalfields (see Petticoat Lane and the Tenterground) in East London. In Wandsworth, their gardening skills benefited the Battersea market gardens. The flight of Huguenot refugees from Tours, France drew off most of the workers of its great silk mills which they had built. Some of these immigrants moved to Norwich, which had accommodated an earlier settlement of Walloon weavers. The French added to the existing immigrant population, then comprising about a