So the 'big' tube strike last week was cancelled, but there's another strike due to run for 48 hours from 9pm on Saturday 6 February.
This one involves station staff who are members of the RMT and is related to the dispute over London Underground's plans to change how stations are staffed (called Fit for the Future). The part of the plan that's most noticeable to the travelling public is the closure of ticket offices, but there are other changes to stations that you can explore on TfL's dedicated website.
What we're not sure about is what the impact of this strike will be. Drivers aren't striking (though some may refuse to cross picket lines) so trains should still run. How many stations will open, however, is uncertain. During strikes in February 2014 TfL managed to keep about half the network going by using 'travel ambassadors' and back office staff. And this time, TSSA staff aren't on strike.
There are more talks planned for later in the week between the RMT and London Underground, which may yet suspend the whole thing. Watch this space.