What House Price Index does HSBC use?

RedDwarf82

I still have nearly a year until my fixed term with HSBC ends. But I was curious about how HSBC would value my property *if* I stay with them. So I found "How is my property valued when I switch my mortgage rate?" in https://www.hsbc.co.uk/mortgages/existing-customers/switch/, which says "We use the House Price Index (HPI) to value your property, instead of valuing it manually. This allows us to use the movement of house prices in your region to estimate its current value."

Does anybody know, from experience, what HPI exactly they use?

I'm guessing it's https://landregistry.data.gov.uk/app/ukhpi ? And the fact it says "in your region" makes it quite clear they don't use some national average. But the second you click on "search the UK house price index", you can start to do things as filter by house type. So "the House Price Index" lack precision.

It says that "If you’re coming to the end of your mortgage’s fixed-term rate and you've received a letter from us, the HPI valuation will be included in your letter.", so I will know within a year. But if somebody knows, I could look at it now to know what to expect.

RedDwarf82

FWIW the online chat has told me they use the Halifax House Price Index. Naturally, the answers from the HSBC online chat are only slightly more believable than the ones from a random person you may meet in a pub.