Thanks to Taxydual for the MoD stats and Grimweasel for confirming the multiplying effect of the UK's domestic defence investments.
Irrespective of whether the UK/US special relationship is over and whether or not we have adequate maritime surveillance, the fact remains that Britain must reboot its defence policy and that this must ultimately result in re-investing in our defence sector (for the reasons already provided).
Where are the Generals who are prepared to lay their balls on the table and educate our politicians regarding what needs to be done. Why don't the Chiefs of Staff march over to Cameron's pad and give him an education in the repercussions of neglecting defence! Is there even a single senior serviceman willing to stand-up and face this challenge!