Helen Deborah Vecht writes
I wonder if breaking the Northern line up into smaller sections would help
simplify things. For example just running the following services; Morden to
High Barnet via the City and Kennington to Edgware via Charing Cross (I
believe the trains can easily loop and Kennington on the Charing Cross
branch, correct me if I'm wrong).

Does anyone think this is a good idea?

No. Though things might appear simpler this way, people like me do not
like changing trains! I need a seat and almost always get one if
boarding at Burnt Oak. The chances of getting a seat are small if
changing at Camden Town.

Changing trains is a nuisance/deterrent for those with luggage,
children and disabilities, many of whom should be encouraged to use
public transport.

Although splitting the Northern line has been mooted on many occasions
in the past - I suppose it reduces the effect of knock-on delays.

I have a vague memory (10+ years ago) of an MP promising that the Tories
would split the Northern line into two.

--
Dave