Name Acronym Date Type* Location Association
(*G–Governmental; I–Institutional; Pr–Private; Pu–Public; S–School & U–University)
| Temple Observatory | TeO | 1871- | S | Warwickshire | Wilson, James M.; Seabroke, George Mitchell; Rugby School |
| The Spaceguard Centre | see Powys County Observatory [PoCO] | ||||
| The Astronomy Centre | TACT | 1982- | I | Lancashire | Drew, Peter; Millar, Rob; Simonian, Linda |
| The University Observatory | UOC | 1823-1946 | U | Cambridgeshire | Airy, George Biddell; Cambridge University |
| Thirlestaine Hall Observatory | THO | 1914-1930 | Pr | Gloucestershire | Player, John |
| Thorp’s Observatory | TO | 1910-1815 | Pr | Flintshire | Thorp, Thomas |
| Thorrowgood’s Observatory | TOW | 1927-1928 | Pr | Surrey | Thorrowgood, W. J. |
| Tomkins’s Observatory | ToO | 1924-1934 | Pr | Essex | Tomkins, Herbert Gerald |
| Toothill Observatory | TOT | c.1988- | I | Hampshire | Solent Amateur Astronomers |
| Torbay Boys’ Grammar School Observatory | TBGSO | 1989- | S | Devon | Torquay Boys’ Grammar School |
| Trent Astronomical Observatory | TAO | 2006- | U | Nottinghamshire | Nottingham Trent University |
| Trinity College Observatory | TCOC | 1739-1797 | U | Cambridgeshire | Trinity College, Cambridge |
| Trinity School Observatory | TSO | 1988- | I | Cumberland | Border Astronomical Society |
| Twice Brewed Inn Observatory | TBIO | 2015- | Pu | Northumberland | Twice Brewed Inn |
| United Charities Institution Observatory | UCIO | 1836-90 | I | Inverness | Inverness United Charities Institution |
| University of Central London Observatory | See University College London Observatory [UCLO] | ||||
| University College London Observatory | UCLO | 1929- | U | County of London | University College, London |
| University Gardens Observatory | UGOUG | 1939-1960? | U | Lanarkshire | Glasgow University |
| University Museum Observatory | UMO | 1860-1875 | U | Oxfordshire | Oxford University |
| University Observatory (Sheffield) | see Western Park Museum Observatory [WPMO] | ||||
| University of Birmingham Observatory | See Wast Hill Observatory [WHOKN] | ||||
| University of Oxford Observatory | UOO | 1875- | U | Oxfordshire | University of Oxford |
| Ward’s Observatory | WaO | 1828-1840 | Pr | Staffordshire | Ward, Michael |
| Wast Hills Observatory | WHOKN | 1982- | U | Worcestershire | University of Birmingham |
| Walker’s Observatory | WOHM | c.1800s-1816 | Pr | Middlesex | Walker, William |
| Water’s Observatory | WOH | 1930-1931 | Pr | Middlesex | Waters, Henry Hayden |
| Waterloo Dock Observatory | see Liverpool City Observatory [LCO] | ||||
| Webb’s Observatory | WeO | 1866-1885 | Pr | Herefordshire | Webb, Thomas William |
| Wellington College Observatory | WCO | 1920- | S | Berkshire | Saunders, S.A.; Wellington College |
| West Hendon House Observatory | see Backhouse’s Observatory [BaO] | ||||
| Weston Park Museum Observatory | WPMO | 1880-1939 | Pu/U | Yorkshire – West Riding | University of Sheffield |
| Whichello’s Observatory | See Whichello’s Chester Observatory [WOCC] | ||||
| See Whichello’s Heswall Observatory [WOHC] | |||||
| See Whichello’s Tattenhall Observatory [WOT] | |||||
| Whichello’s Chester Observatory | WOCC | 1900-1914 | Pr | Cheshire | Whichello, Harold |
| Whichello’s Heswall Observatory | WOHC | 1914-1923 | Pr | Cheshire | Whichello, Harold |
| Whichello’s Tattenhall Observatory | WOT | 1923-1936 | Pr | Cheshire | Whichello, Harold |
| Whitaker’s Observatory | GWO | 1940s-1950s | Pr | Nottinghamshire | Nottingham Astronomical Society Granger, Richard; Whitaker, J. W.; |
| Whitbread’s Observatory | WOC | 1851- | Pr | Bedfordshire | Whitbread, Samuel Charles |
| Whitelow’s Birkdale Observatory | WBO | 1910(c.)-1932 | Pr | Lancashire | Whitelow, Edward Turner |
| Widey High School Observatory | WHSO | 1960-? | S | Devon | Harris, Lawrence |
| Wigglesworth’s Observatory | WigO | 1885-1890 | Pr | Yorkshire: North Riding | Wigglesworth, James |
| Wilding’s Observatory | WOBP | 1896-1900 | Pr | Lancashire | Wilding, Richard |
| Wilkins Memorial Observatory | WMO | 1961-2012 | I | Kent | Crayford Manor House Astronomical Society; Wilkins, Hugh Percy |
| Wilkins’s Observatory | WOB | 1918-1960 | Pr | Kent | Wilkins, Hugh Percy |
| Williams’s Observatory | WO | 1880-1897 | Pr | Merionethshire | Williams, George |
| Wilred-Hall Observatory | see Alston Observatory [AsO] | ||||
| Wilson’s Observatory | WiO | 1871-1924 | Pr | Westmeath | Wilson, W.E. |
| Winks’s Observatory | WiO | 1890s | Pr | Glamorgan | Winks, William |
| Wollaston’s Observatory | WoOC | 1770-.1820s | Pr | Kent | Wollaston, Francis |
| Wolsingham Observatory | WoO | 1888-1939 | Pr | Durham | Espin, Thomas Henry Espinall Compton |
| Woodside Observatory | see Hepple Observatory [HeO] | ||||
| Worth Hill Observatory | 1996-2009 | Pr | Dorset | Strange, David | |
| Worthing Astronomical Society Observatory | WASO | 1972-1987 | I | Sussex | Worthing Astronomical Society; Windlesham House School |
| Worthington’s Observatory | See Worthington’s Crumpsall Observatory | ||||
| See Worthington’s Four Marks Observatory | |||||
| Worthington’s Crumpsall Observatory | WOCH | c.1847-1868 | Pr | Lancashire | Worthington, Robert; Baxendell, Joseph |
| Worthington’s Four Marks Observatory | WOFM | 1913-1925 | Pr | Hampshire | Worthington, James H. |
| Wrottesley Hall Observatory | WHO | 1842-1867 | Pr | Staffordshire | Wrottesley, Sir John |
| Wrottesley Observatory | WOBCM | 2007-2010 | I | Staffordshire | Armitage, John; Black Country Museum |
| Wrottesley’s Observatory | WOBL | 1829-41 | Pr | County of London | Wrottesley, Sir John |
| Wrottesley-Philips Observatory | WPO | 2006-2010 | I | Staffordshire | Armitage, John; Pendrell Hall Adult Education College |
| Wrottesley’s Observatory | see Wrottesley Hall Observatory (WHO) | ||||
| Wynyard Planetarium and Observatory | WPOW | 2002- | Pu | Durham | Darlington Astronomical Society; Stockton-on-Tees Council |
| York Observatory | see Yorkshire Philosophical Society Observatory [YPSO] | ||||
| Yorkshire Philosophical Society Observatory | YPSO | 1833- | I | Yorkshire: North Riding | Yorkshire Philosophical Society |