The tunnel is part of the De Vere Horsley Estate, once the home of mathematician Ada Lovelace.
The grand Horsley Towers was once lived in by prominent 19th century mathematician Ada Lovelace.
Ms Flaherty led a team within Europe's biggest cyber defence exercise to date, says the MoD.
The Grade II listed property in East Horsley is being sold as it is "too costly" to modernise.
The ride is a fundraiser for a horse riding charity for people with disabilities.
Take a moment to read five stories we picked from Surrey this week.
Campaigners are calling for donations to support the possibility of a judicial review.
Rebecca Richmond-Smith said the challenge has left her in awe of the star.
The man's next of kin have been informed and are being supported by specialist officers, police say.
