Commuters have been wrongfooted by last-minute strikes announced on the London Underground. The TSSA rail union announced the sudden strike action on Wednesday, which is expected to cause disruption into the weekend. The walkouts by customer service managers will mean some stations “may need to close at short notice,” according to Transport for London. Here is what you need to know: The walkouts will take place on Friday and will mean that TSSA members will not commence work on any shift starting between 00:01 to 23:59. That means that strike action will run over into Saturday, as any staff will not be carrying out overnight shifts due to have started before midnight on Friday. TSSA took strike action on April 10 which closed stations at short notice. The strikes today are also likely to cause stations to close at the last minute. Customer Service Managers at TSSA will also take part in an overtime ban from April 29 to May 5. This overtime ban will again lead to station closures at very short notice, said TSSA At present it is not thought to be causing major disruption. Recommended April train strikes: Dates and the services affected Read more Customer service managers at the TSSA...