From Watford High Street train to Wembley Central Station then line 92 bus to Greenford, Ruislip Road East (UB6). 56 min £5. From Watford, Beechen Grove line 8 bus to Northwood, Mount Vernon Hospital then line 282 bus to Greenford Broadway. 1 h 35 min £6. From Watford taxi to Greenford. 19 min £47. From Watford drive to Greenford. 19 min £2.