Pollock and MacNab
Pollock and MacNab of Britannia Works, Hyde, and later Bredbury, Stockport were machine tool makers
Maker of stationary engines. 
1866 Business established.
c.1872: 16 HP horizontal engine for Greenfield & Stewart’s sawmill, Wellington New Zealand 
1879 Advert in The Argus, Melbourne, 5 July 1879, for Roberts, Morris and Deakin, agents in Victoria for Pollock & MacNab, offering horizontal engines, with cylinders 11"-28" bore, lathes with centres 7½" to 16", shaping, slotting and planing machines.
1888 Two beam engines for Alma Road Pumping Station, Ponders End.
1911 Boring and Surfacing Lathes; Radial drills. 
1911 Manufacturer of Machine Tools for the Railways.
1919 Company reincorporated as Pollock and MacNab (1919) Ltd
Sources of Information
- Stationary Steam Engines of Great Britain by George Watkins. Vol 10
-  Online copy of Wellington Independent, Issue 3426, 19 February 1872
- ‘Stationary Steam Engines of Great Britain, Volume 8: Greater London & South East‘, by George Watkins, Landmark Publishing Ltd
- Machine Tools by James Weir French in 2 vols. Published 1911 by Gresham.
- Bradshaw’s Railway Manual 1911