@Utility
Agreed - girls at all-girls schools going on to all-girls schools.
No, that's not right. Here is The Times's list of the top 30 independent schools in London.
Top independent secondary schools in London
1 St Paul’s Girls’ School, Hammersmith
2 The Godolphin and Latymer School, Hammersmith
3 King’s College School, Wimbledon
4 St Paul’s School, Barnes
5 Westminster School
6 City of London School
7 North London Collegiate School, Edgware
8 Hampton School
9 University College School, Hampstead
10 City of London School For Girls, Barbican
11 Highgate School
12 South Hampstead High School GDST
13 Latymer Upper School, Hammersmith
14 James Allen’s Girls’ School, Dulwich
15 Eltham College, Mottingham
16 Lady Eleanor Holles School, Hampton
17 Wimbledon High School GDST
18 Whitgift School, South Croydon
19 Channing School, Highgate
20 Putney High School GDST
21 Alleyn’s School, Dulwich
22 Trinity School, Croydon
23= Notting Hill and Ealing High School GDST
23= Dulwich College
25 Bancroft’s School, Woodford Green
26 Kingston Grammar School
27 Sydenham High School GDST
28 Ibstock Place School, Roehampton
29 Surbiton High School, Kingston upon Thames
30 Hampton Court House, East Molesey
It's what you would expect. You could argue that it's a rough and ready measure, but it shows the best schools in an order that makes approximate sense. Hence why I suggested to the OP that if you have the option of PHS, and if the journey isn't prohibitive, take PHS over Emanuel. This would also explain the preferred destinations for the prep schools I listed, not geography or a reference for singe sex education.