UK House prices

Just as my eldest gets to enter the housing market, admittedly knocking £15k off an offer to get a 2 bedroom flat in catford, london for £295k things look to slow further.

Can see it going down more than 10% and then back up 10% within 2 yrs so lets see 2020?

https://www.ft.com/content/0110c046-858d-11e7-bf50-e1c239b45787