What time to leave for Brentford

[slackerpage]

I cant get out of work early tuesday and haven't been to Brentford before, how long does the trip take and what time is the latest i could leave to make kick off ?

 

[Bevendean Gull]

Its easy train to clapham. Chanage there for brentford think brentford is about 20mins from clapham!