Retiring Trident
retiring-trident
retiring-trident
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<strong>Retiring</strong> <strong>Trident</strong><br />
Notably, both of these steps could be taken today, extending the life of the current Vanguard-class<br />
SSBNs, but it is noteworthy that the Liberal Democrats have not proposed this.<br />
46 The length that CASD could be sustained for would depend on the number of SSBNs procured.<br />
For an excellent analysis of the choices, see “A Disturbance in the Force”, Hugh Chalmers, RUSI, 31<br />
January 2014, pages 7 – 8.<br />
47 This is either both of two SSBNs or two of the three SSBNs.<br />
48 Whilst the warheads themselves are independently targetable, they needs to fall within an ellipse<br />
known as the “MIRV footprint”. The size of the <strong>Trident</strong> II D5 footprint is not public, but it is known<br />
that the ellipse is lengthened for longer-range launches. “The Future of the British Bomb”, John<br />
Ainslie, WMD Awareness Programme, 2006, pages 79 – 80.<br />
49 <strong>Trident</strong> II D5 is very accurate, but absolute accuracy varies based on range, weather conditions and<br />
the re-entry profile flown by the warheads. See “The Future of the British Bomb”, pages 79 – 80.<br />
Though the US Mark 5 Re-entry Vehicle (RV) with the US 475kt W-88 warhead is not used by the<br />
UK in the hard-target counterforce role, it is noteworthy that the Mk. 5 has a stable nosetip design<br />
to reduce accuracy degradation when passing through snow or rain in contrast to the Mark 4 in UK<br />
service. See “From Polaris to <strong>Trident</strong>: the Development of US Fleet Ballistic Missile Technology”,<br />
Graham Spinardi, Cambridge University Press, Cambridge, 1998, page 153.<br />
50 Weapon accuracy is measured in “Circular Error Probable” (CEP). This is a circle into which 50% of<br />
functional drops will fall, and is usually measured in meters. When a weapon suffers a technical<br />
malfunction after release, it is not recorded in the CEP calculation.<br />
51 The House of Commons Defence Select Committee in 2006 described accuracy as within “a few<br />
meters”. See “The Future of the UK’s Strategic Nuclear Deterrent”, Eighth Report of the House of<br />
Commons Defence Select Committee, HC 986, 30 June 2006, paragraph 18.<br />
52 “SDR98 Supporting Essays: Essay 5”, Cabinet Office, 1998, paragraph 13.<br />
53 “Nuclear Deterrence Theory: The Search for Credibility”, Robert Powell, Cambridge University<br />
Press, Cambridge, 1990, pages 111 – 112.<br />
54 Stewart Hosie MP (Dundee East), Angus MacNeil MP (Na h-Eileanan an Iar / Western Isles), Angus<br />
Robertson MP (Moray), Michael Weir MP (Angus), Pete Wishart MP (Perth and North Perthshire),<br />
Eilidh Whiteford MP (Banff and Buchan).<br />
55 “Nicola Sturgeon sets out her conditions for an SNP deal with Labour”, George Eaton, New Statesman,<br />
15 November 2014.<br />
56 “Nicola Sturgeon sets out her conditions for an SNP deal with Labour”, George Eaton, New Statesman,<br />
15 November 2014.<br />
57 “Relocation, Relocation, Relocation: Could the UK’s Nuclear Force be Moved after Scottish Independence?”,<br />
Hugh Chalmers, Malcolm Chalmers, RUSI Occasional Paper, RUSI, London, August 2014.<br />
58 “Relocation, Relocation, Relocation”, page 12.<br />
59 Jonathan Edwards MP (Carmarthen East and Dinefwr), Elfyn Llwyd MP (Dwyfor Meirionnydd),<br />
Hywel Williams MP (Arfon).<br />
60 Target seats are Ynys Môn (Anglesey) and Ceredigion.<br />
61 “Plaid Cymru leader, Leanne Wood, says “Scrap <strong>Trident</strong>!”, scraptrident.org, 12 April 2013.<br />
62 “Plaid Cymru on <strong>Trident</strong>”, Democracy Live, BBC, 4 July 2012.<br />
63 Douglas Carswell MP (Clacton), elected on 9 October 2014, and Mark Reckless MP (Rochester and<br />
Strood), elected on 20 November 2014.<br />
64 “Ukip is making British politics more European”, Peter Kellner, YouGov, 24 November 2014.<br />
65 “Nigel Farage: 2010 UKIP manifesto was ‘drivel’”, BBC News, 24 January 2014.<br />
66 “Nigel Farage: 2010 UKIP manifesto was ‘drivel’”, BBC News, 24 January 2014.<br />
67 Dr Caroline Lucas MP (Brighton Pavilion).<br />
68 Green Party is targeting Norwich South (Liberal Democrats), Bristol West (Liberal Democrats),<br />
St. Ives (Liberal Democrats), Sheffield Central (Labour), Liverpool Riverside (Labour), Oxford East<br />
(Labour), Solihull (Liberal Democrats), Reading East (Conservative), York Central (Labour), Holborn<br />
and St Pancras (Labour), Cambridge (Liberal Democrats). See “Confident Greens eye 12 seats in<br />
England”, Toby Helm, The Observer, 19 October 2014.<br />
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