After reading this tale of woe I am of the opinion that the only monster to have been created is of the Green-Eyed, Two Headed variety, a rare species known as a "Fets-Pratt".
They obviously want all of the work in Durham for their own companies without any "outside" interference.
All of their vehicles are obviously emission-free and their drivers do not create a sound or commit any traffic offences or parking violations.
If there are "hundreds" of taxis and the area is not being cleared until after 4am, then basic mathematical theory must mean that there are thousands of people wanting to go home so perhaps a few hundred more taxis are required.

There is more demand for taxis in Durham City than ever before. Gone are the days when the only people out at night were students, poor little rich kids sitting with a half of real ale and a bag of crisps between six of them, all wearing the clothes of their deceased elderly relatives

No, For a while now Durham has been on the up and up, more clubs, bars and restaurants, even a huge theatre, all in the Claypath area.
Of course, any customer who is loyal to their own chosen taxi/ph company will book them to take them there and pick them up so the choice is theirs.
Finally, Messrs Fets and Pratt should be thankful there are so many Durham plated Hackney Carriages working from Private Hire offices in Gateshead, Newcastle, North Tyneside, South Tyneside and many more areas. If these were all chased back to Durham there would be even more drivers threatening their monopoly.
