The timing of decisions on the
Trident II D5 missile
46. The White Paper states that decisions on the
future of the Trident II D5 missile are also required now. It
says that the United States Government "plans to extend the
life of the Trident II D5 missile to around 2042 to match the
life of their Ohio-class submarines". It says that this "will
involve the manufacture of a number of new missiles and the modernisation
of the existing missiles". The Government states that this
"work will focus entirely on replacing components of the
system" and that "there will be no enhancement of the
capability of the missile in terms of its payload, range or accuracy".
The White Paper states that
Unless we participate in that life extension programme,
it will not be possible to retain our existing Trident D5 missiles
in service much beyond 2020, except at much greater cost and technical
risk. Decisions on whether or not we should participate are required
by 2007.[58]
47. In an exchange of letters between the Prime
Minister and the US President on 7 December 2007, Mr Blair stated
that
we have decided that we will replace the Vanguard
submarines with another class of submarines in the 2020s, and
would like these submarines to continue to carry the Trident II
D5 missiles
Accordingly, we wish to participate in the planned
life extension programme for the Trident II D5 missile, which
we understand is intended to extend the life of the missiles into
the 2040s.[59]
48. The Prime Minister also sought an assurance that
"we can, if we so choose, maintain a nuclear delivery system,
with US assistance, for at least the remainder of the life of
our successor submarine force". He also stated that "the
United Kingdom wishes to ensure that any successor to the D5 system
is compatible with, or is capable of being made compatible with,
the launch system for the D5 missile, which we will in the meantime
be installing into our submarines". Consequently, the Prime
Minister stated that
there would be merit in the United Kingdom having
the opportunity to participate, at an early stage, in any programme
to replace the D5 missile, to match the potential out of service
date of our new submarines.[60]
49. The reply from the US President stated that the
United States "continues to attach great importance to the
maintenance of an operationally independent nuclear deterrent
capability by the United Kingdom". It also said that
the United States fully supports and welcomes the
intention of the United Kingdom to participate in the life-extension
program for the Trident II D5 missile. We will work to ensure
that the necessary components of the overall system are made available
to the United Kingdom to support life-extended D5 missiles
For
the longer term
I would invite the United Kingdom to participate,
at an early state, in any program to replace the D5 missiles or
to discuss a further life extensionfor your purposesof
the D5 missile to match the potential out-of-service date of your
new submarines. In this respect, any successor to the D5 system
should be compatible with, or be capable of being made compatible
with, the launch system for the D5 missile, which you will be
installing into your new submarines. The United States will also
ensure
that the United Kingdom has the option to sustain
an effective nuclear delivery system for at least the life of
your successor submarine force as was done with the Polaris system.[61]
50. Neither
the White Paper nor the exchange of letters between the Prime
Minister and the US President in December 2006 explain adequately
why decisions on UK participation in the Trident D5 missile life
extension are required by 2007. The Government should clarify
why decisions on the missile are required now.
8