What's involved:

There are a number of specialisms within a tunnelling team and tunnellers range from operating large diameter tunnel boring machines to working as a back-up operative.

It is classed as a civil engineering specialism and most tunnellers start out working in the pit bottom removing spoil, before progressing within the team to become qualified.

Skills required:

You have to be able to work in a confined environment for extended lengths of time, as some tunnels you could be working on will extend for several kilometres.

Safety and being part of a structured team is a must, as working in an environment like this means you will be relying on others and they have to be able to rely on you.

Qualifications required:

No formal qualifications are required but ideally you'll be over 18. Entry at a higher level can be achieved at degree level after attending university.

Salary ranges:

Qualified and experienced tunnellers can expect to earn in the region of £14,000 - £24,000 dependent on skills and the bonus and overtime system.