what sort of jobs are available to poeple with this degree? will it require extra training?
Almost anything you want. The only jobs that won't be available to you will be those requiring specialist science degrees.
Basically every job will require some form of training when you start however only a handful will require additional qualifications; actuary and accountancy, for example.
Accountancy, banking, finance. anything that requires rigour, logic, thorough thought.
Quantity surveying would be a good one.