From Watford Junction train to Euston Underground Station, Tube to Tottenham Hale, then train to Broxbourne. 59 min £14. From Watford, Clarendon Road bus to Hertford, Bus Station then line 310 bus to Hoddesdon, Clock Tower. 2 h 23 min £11. From Watford taxi to Hoddesdon. 30 min £113. From Watford drive to Hoddesdon. 30 min £5.