Companies House
Companies House is the Registrar of limited companies in the UK.
http://www.companies-house.gov.uk
Court Funds Office
The Court Funds Office website contains information on monies paid into Court including 'Dormant Funds' and 'Money in Chancery'
http://www.courtfunds.gov.uk
The Crown Estate
If the Treasury Solicitor disclaims property, which was previously owned by a dissolved company, then it passes to the Crown Estate.
http://www.thecrownestate.co.uk
Any enquiries are then addressed to their solicitors, who are Burges Salmon, Narrow Quay House, Narrow Quay, Bristol BS1 4AH.
http://www.burges-salmon.com
Farrer and Co
If the deceased was domiciled or the dissolved company's last registered office was in either Lancashire or Cornwall you should contact them.
http://www.farrer.co.uk
Farrer and Co are the Solicitors for the Duchy of Lancaster
http://www.duchyoflancaster.co.uk/output/bona-vacantia.aspx
and the Duchy of Cornwall
http://www.duchyofcornwall.org/managementandfinances_bonavacantia.htm
General Register Offices
General Register Offices where you can obtain birth, death, stillbirths, marriage, civil partnerships and adoption certificates, also available from local Registrars where the event took place.
England and Wales.
http://www.direct.gov.uk/gro
Scotland.
http://www.gro-scotland.gov.uk
Northern Ireland.
http://www.groni.gov.uk
Registrations for the Republic of Ireland and those in Northern Ireland before 1922.
http://www.groireland.ie
The Land Registry
The Land Registry holds the records of registered land in the UK.
http://www.landregistry.gov.uk
Probate Registry
The Probate Registry is the office holding records of all wills proved and grants of representation issued in England and Wales since 1858.
http://www.hmcourts-service.gov.uk/cms/wills.htm
The Queen's and Lord Treasurer's Remembrancer
The Queen's and Lord Treasurer's Remembrancer deal with bona vacantia cases where the deceased was domiciled or the last registered office of a dissolved company was in Scotland.
http://www.crownoffice.gov.uk/About/roles/qltr/Bona-Vacantia
Treasury Solicitor's Office
The Treasury Solicitor's website contains information on the other types of work carried out by the Agency and other points of interest.
http://www.tsol.gov.uk