The strikes have provoked a furious backlash from student unions, who fear disruption during exam season.
Brown said some passengers would face disruption during major works and that changes would come gradually across the network.
However, airports and ports escaped serious disruption during the 30 November walkouts, in which the PCS took part.
The two also share a dressing room, which assures little disruption during their preperformance routine.
Victoria line services faced severe disruption during the incident as police searched the area.
Alfie Meadows was accused of causing disruption during the 9 December 2010 demonstration in central London against plans to treble tuition fees at English universities.
Prosecutors alleged that he plotted political assassinations with US military officials in Iraq before returning to Iran "aiming at causing disruption during and after the election".
That makes China's communications, surveillance and missile guidance equipment "less vulnerable to foreign disruption during a protracted conflict," the report said.
He has kept increases in the minimum wage to inflation, and tried to limit union power and disruption during strikes.
Many also saw their parents struggle through a pay cut, a job loss or another economic disruption during the recession.
The Royal Mail said its delivery service continues to experience "significant disruption" during what is the mail service's busiest time of the year.
