Pritchard Englefield, a long-established medium-sized commercial law firm in the City of London, merged with Thomas Eggar LLP on 1 May 2013, another long-established law firm with origins in Sussex, operating out of offices in London, Sussex, Berkshire and Hampshire, and headquartered in Crawley. Subsequently, in 2016 Thomas Eggar merged with Irwin Mitchell LLP, another long-established law firm with origins in Sheffield. This took the number of Irwin Mitchell offices nationally to 17: in London the merged offices operate from 40 Holborn Viaduct.