Currently the only flying Lightnings are at Thunder City, owned by Mike Beachy Head, based out of Cape Town International Airport in South Africa. Sadly they lost a T.5 recently with loss of pilot Dave Stock.
here is a link: http://www.capeargus.co.za/index.php?fArticleId=5245754
A tragic loss for the Lightning community. These are rare jets indeed, only 3 now flying in the world. By the way, South Africa never operated Lightnings, they ended up in Cape Town because of the bureaucratic difficulties of flying them privately in the UK.
If you got money to burn, head on down to Thunder City, they will also fly you in the awsome Hawker Siddley Buccaneer and Hawker Hunter or the more sedate BAC Strikemaster. Can't wait to see the restored one flying in the USA and Airventure.