Much attention gets focused on the US with respect to TC. Here's a little piece on the UK.
1. In the UK's TC space, the academic field seems to be lead by Royal Holloway College, which is part of the University of London. http://www.isg.rhul.ac.uk/
It has also been heavily involved in the European TC conference schedule. http://www.isg.rhul.ac.uk/etiss
RHUL studies relating to TC include its use generally and its relationship to virtualisation, mobile environments, P2P security, and crimeware. Here are links to some of their papers in no particular order:
http://www.isg.rhul.ac.uk/~cjm/tcsaa.pdf
http://www.isg.rhul.ac.uk/cjm/msatc2.pdf
http://www.isg.rhul.ac.uk/cjm/catc.pdf
http://www.isg.rhul.ac.uk/~kp/P2PTCchapter.pdf
http://www.isg.rhul.ac.uk/~cjm/utctsm.pdf
http://www.ma.rhul.ac.uk/static/techrep/2010/RHUL-MA-2010-12.pdf
2. CESG, which plays a role in the UK a bit like NSA in the US, has recommended the use of TPMs within the UK government. Unlike NSA, I don't think CESG has been fighting a turf war with an equivalent Homeland Security Department. http://www.cesg.gov.uk/publications/media/policy/ciatt-01-11-trusted_platform_modules.pdf
CESG is also part of the TCG's Mobile Phone Workgroup.
3. HMG runs the UK's health system via the NHS. This organisation is the fourth largest coherent employer in the world, with almost 1 1/2m workers. NHS was listed by Wave as having done a pilot study of their technology.
4. The UK's corporate environment is a bit more concentrated than its equivalent in the US, but it contains genuine behemoths (even on a global scale) in several industries: BAE in defence/aerospace; RBS (majority owned by the state after the financial crisis and also the world's largest company by assets), HSBC, Barclays, LloydsTSB and Standard Chartered in banking; Lloyds of London, Aviva and Prudential in insurance; BP and Shell (if it still counts) in energy; Vodafone and BT in telephony; BHP Billiton, Rio Tinto and Anglo-American in mining; GlaxoSmithKline and AstraZeneca in pharmaceuticals; Unilever in consumer products; National Grid, Scottish & Southern Energy and Severn Trent in utilities etc. BAE seems to have adopted the use of TPMs. Vodafone is/was a member of the TCG's Mobile Phone Work Group.
http://www.thefirewall.co.uk/news/61/rising_global_security_threats_shine_light_on_shortcomings_of_proprietary_software-based_security/
http://www.trustedcomputinggroup.org/files/resource_files/8791DAF9-1D09-3519-ADC146DBA39E8A6D/Final_spec_overview_CTIA_sept_13.pdf
5. ARM is a UK company. Note the studies in mobile telephony listed at the top. The UK is surely going to be a key domain in TCG's relationship with the mobile phone industry (ARM, like Vodafone and CESG, is a member of TCG's mobile phone work group). I've speculated on Wave's involvement in a Wave-Nokia-MS mobile consortium. Maybe I should add ARM to the list. Or maybe we should see ARM investing the PC space as an equally significant possibility: http://www.digitaltrends.com/computing/arm-wrestling-microsofts-big-bet-on-windows-8/
6. We already know that BitLocker is judged suitable for the protection of restricted data within HMG. We also know that Wave recently announced its support for BitLocker. http://www.cesg.gov.uk/find_a/archive/iauk/PageFiles/3226/bitLocker-drive-encryption-announcement-march2010.pdf
7. PWC has adopted use of TPMs, and in particular notes their cost advantages, an observation reflected in CESG advice to the UK government departments . PWC is a UK-headquartered professional services organisation with a global reach.
Please don't dot connect this into some UK domination uber-plan: I suspect a lot of what is going on is only indirectly related. Even so, there's a fair amount when looked at in sum.