HSBC have further reduced their 10 year fixed mortgage rate down to 2.49%.
Appears to be open to all mortgages provided your LTV is 65% or greater.
Seems to have only just been changed, as mortgage comparison tools are still reflecting 2.64%. It's a good deal, but it all depends on your personal circumstances. Appears to be the cheapest in the market.
Others have indicated that HSBC are strict / difficult to obtain mortgages with.
The previous HSBC 10 year fix deal at 2.64% is shown here: http://www.hotukdeals.com/deals/10-year-fee-free-fixed-mortgage-2-64-65-ltv-2512575