Tunnels below your house -HS2

[Beggarall]

We are contemplating a move to the Amersham/Wendover area in the Chilterns. HS2 is planned to go through this area but a long tunnel (with venting areas) takes it underneath some of the laces we are searching. Does anyone know the effects of having a tunnel underneath your house - even if quite a long way down. I have read about subsidence and vibrations but anyone got practical experience. Is this a "no go" issue? Thanks for any advice