@KievLoverTwo Nah, this is my job, I know what I'm talking about.
TwentyEA/CI rely on scraping property portals for their sales data - it always undercounts, not everything is marked in a way they can pick up, they miss anything not on Rightmove or Zoopla, or anything sold off market, which is a significant part of the market at the top end. Land Registry recorded transactions to the end of August are 680k, so you need about 80k transactions per month across the last 4 months of the year to get to 1million - seems perfectly reasonable, especially considering that mortgage rates have been dropping since mid-August compared to what was on offer in June & July, and there are still a lot of active cash buyers.
Just to give you an example of how patchy the TwentyEA data is - they have 970k sales for 2021. Land Registry, which is officially recorded government data, and has to be involved in every single sale, has 1.4 million transactions for that year.
You can see on the TwentyEA/CI slide that their recorded sales are currently at 89.7% of their 2017-19 levels. 89% of 1.2 million, which is the average number of annual sales in that period according to Land Registry is... 1.06 million.