Certainly the accent or class of teachers is no where near top of my list of reasons for private schools - I just threw it in...
From BBC web site:
"Teacher recruitment
In their study of "Competition for Private and State School Teachers", the LSE economists argue that there is a "loss" to state schools, and an equivalent "bonus" to private schools, in the net flow of publicly-trained teachers into the private sector.
They have produced some interesting statistics. While the independent sector educates just over 7% of all pupils in England, it employs 14% of teachers.
The apparent mismatch is because of the much smaller class sizes in independent schools.
Interestingly, the class size difference - as measured by pupil-teacher ratios - has widened since the 1980s. The ratio is now 18:1 in the state sector compared with 9:1 in independent schools.
So, with fee income rising ahead of inflation, the independent schools have used this premium to recruit teachers at a faster rate than pupils.
They have also particularly recruited better-qualified and more experienced teachers, as well as those in shortage subjects, like maths and science.
Thus while the proportion of male state school teachers with a higher degree is 45.2%, in the private sector it is 55.6%. A similar gap is evident when comparing teachers with higher degrees in sciences, maths and engineering. The gap amongst female teachers is also evident, although less marked.
In 2006, independent schools recruited 1,125 teachers straight out of universities and training colleges.
In addition, they recruited 2,009 experienced teachers from state schools. The flow, of course, is not all one way, as some teachers move back into the state sector. But the net flow to the independent sector was 1,400 experienced teachers in 2006.
The report says this amounts to a "significant loss" on the state's investment in teacher training and that this transfer of experience teachers is a "substantial bonus" for the private sector.
State school 'damage'
Of course, parents paying school fees could argue that this means they are getting at least some small return for the taxes they pay on top of school fees. "