Britain is to supply homeland security expertise and equipment to Kuwait under a deal expected to be signed off later.
The Amir of the oil-rich Gulf state is meeting business leaders at the end of a three-day state visit.
Among agenda items is the first phase of the Kuwaiti Security Programme, being led by a trading arm of the Foreign Office, FCO Services.
Sources said the arrangement could be worth up to £1.5 billion to UK security and defence firms over 10 years.
Techniques and hardware used to protect the 2012 Olympic Games in London are among the items that the Kuwaitis are believe to be interested in adopting.
The deal will concern human rights groups at a time of protests against voting reforms in Kuwait which the opposition say skew the poll in favour of pro-government candidates.
Tear gas, smoke bombs and baton charges have been deployed by police to break up some recent demonstrations in the relatively-peaceful state.
The Amir held talks with Prime Minister David Cameron.
Downing Street said Mr Cameron "expressed his admiration of the deep-seated democratic traditions within Kuwait, which are a model for others in the region".
A source said that all exports under the deal would be subject to the usual scrutiny process to ensure none would be used in repression.