Dataset attributes are as follows; not all combinations exist.

• Measurements: volume of sales (#), average price (GBP), price index (2015=100)
• Adjustment: seasonally adjusted (SA) or not (NSA)
• Breakdowns: age (new or existing), type of structure (detached, semi-detached, terraced, flat), type of sale (cash or mortgage), type of buyer (first-time or former owner-occupier)
• Geo coverage: Country, 17 regions, 423 counties and county-equivalents
• Start dates: January 1995 (England and Wales), January 2004 (Scotland), 2005Q1 (Northern Ireland)

The series reside in the historical catalog (United Kingdom » Real Estate » Residential » Prices » Land Registry House Price Index) and include, for example:

• HPLTRUM.IGBR              = House Price: New and existing - Residential - Average price, (GBP, NSA) - for U.K.
• HPLTRAM.IGBR_YOHU         = House Price: New and existing - Residential - Average price, (GBP, SA) - for Yorkshire and the Humber
• HPINRUM.IGBR_WALS         = House Price Index: New - Residential, (Jan2015=100, NSA) - for Wales
• HPITRROWUM.IGBR           = House Price Index: New and existing - Residential - Terraced housing, (Jan2015=100, NSA)
• HPITRFTBUM.IGBR_E06000001 = House Price Index: New and existing - Residential - First-time buyer, (Jan2015=100) - for Hartlepool
• HPLTRDTSUM.IGBR_E07000047 = House Price: New and existing - Residential - Semi-detached houses - Average price, (GBP, NSA) - for West Devon
• HPQTRUM.IGBR_E07000047    = Volume of sales, (#, NSA)
• HPITRUQ.IGBR_NOIR         = House Price Index, (2015Q1=100, NSA) - for Northern Ireland

Because catalog locations are subject to change, the upper-right search box on DataBuffet.com provides a "find in catalog" mode that accepts a mnemonic.

References

• Collection - UK House Price Index: reports
• About the UK House Price Index