You do realise they are very unlikely to read this?
It would be normal to write to them directly.
A university is allowed to have its own admissions policy. It is quite common for unis to require you to have been involved in formal education recently. That wouldnt just be Exeter..
Were you aware of the policy beforehand? It would seem strange to apply if it was such a big issue for you?
Our decision
We recognise that mature students may offer different qualifications and experience, which will be taken into account when we assess your application, it is important that you have adequate experience and/or qualifications to allow you to cope with academic demands of your course. It is normally recommended that you should have undertaken some recognised systematic course of study (eg, Access, Open University credits, or GCE A levels) within the last three years.
Where an applicant has not undertaken any recognised form of systematic study within the last three years, the application may be referred to the Admissions Tutor for consideration. We advise that full details of any relevant work experience or other relevant information is provided within the application. We may also ask applicants who fall into this category to attend an interview to ensure that they are suitable for entry into a particular programme of study.
If you have any queries concerning entrance requirements, please contact the Admissions Office who will be happy to advise accordingly. Official notification of our decision will be made through UCAS.