Surveillance satellites are situated above the UK and use radiation technology to survey subjects.
Digital spying is widespread With the NSA and GCHQ collecting email meta data which can be quickly and easily searched. Internet routers are quickly bypassed with MI5 obtaining wireless keys from the manufacturer and even complex Apple, Microsoft or Google Android encrypted software can be hacked using backdoor keys resulting in webcams and microphones being took over.
The only way to secure a MacBook is to encrypt the disk before downloading the O.S then firewalling your laptop and placing it in the DMZ on your internet router. Also changing the wireless key and admin password regularly whilst in safe mode.
A 3D map of the surrounding area can be created by satellite and internet signals.