Urgent closure of the Victoria line confirmed for Saturday evening

There is going to be an urgent partial closure of the Victoria line on Saturday evening to carry out repairs to the track outside Brixton station.
Brixton tube station
The fault, a points failure at the junction outside Brixton station, was detected a week ago and has meant trains crossing the junction had to slow down more than usual. The speed restriction means they can run only 24 trains per hour, instead of the usual 36 during rush hour. This has caused delays on the line because they can&rs