In uk.transport.london Tom Anderson wrote:
The clever bit about the Bakerloo tunnel is that it allows trains that
would otherwise have to reverse at Queen's Park to go somewhere; if the
plan to reorganise the DC lines comes to pass, so that all Bakerloo trains
can go beyond Queen's Park, with NR trains (from the Overground)
terminating there, this becomes a less good plan.

Possibly-ignorant question: why can't some Bakerloo trains go beyond Queen's
Park? I looked on the interweb but couldn't find anything about some trains
being different to others.

Kake