Unfortunately "proper legal advice" might need to be taken if any Restrictive Covenant is to be enforceable....
There are broadly four types of restrictive covenant:
1. non-compete covenants – which seek to prevent an ex-employee from directly competing or working for a competitor, usually within a specific geographical area, for a set period following termination;
2. non-solicitation/non-dealing covenants – which seek to prevent an ex-employee from entering into working relationships with former customers, by seeking or accepting orders for goods and services, for a set period following termination.;
3. non-poaching of employees – which seek to prevent an ex-employee from recruiting former colleagues for a set period following termination;
4. restrictions on the use of confidential information – which seek to prohibit the use of any confidential information (usually identified by a non-exhaustive list of examples) acquired by an employee during employment.
Have a look at the following
http://www.gannons.co.uk/employment_law/?page=restrictive_covenants it gives a 'checklist' of considerations.