|Photo credit: hotblack from morguefile.com|
Each will be a 48hr strike starting at 19:00 BST - the first will take place on 23rd June and the second on 7th July.
The extent of the disruption isn't yet known - but if previous industrial action is anything to go by it will be fairly horrendous trying to use the tubes on those days.
The Northern, Piccadilly and Jubilee Lines (those formerly operated by Tube Lines) are expected to be worst hit.
The first date also coincides with England's final World Cup group match against Slovenia.. although that will be over by 7pm.