Greater Anglia operates a train from Chelmsford to Mersea Island hourly. Tickets cost $13 - $19 and the journey takes 30 min. Alternatively, Arriva UK operates a bus from Chelmsford to Mersea Island every 20 minutes. Tickets cost $6 - $9 and the journey takes 1 h 21 min. Arriva UK also services this route hourly.
How to get from Chelmsford to Mersea Island
From Chelmsford train to Wivenhoe. 30 min £11. From Chelmsford City Centre, Cathedral bus to Colchester Town Centre, High Street (Colch High St) then line 67 bus to West Mersea, Waldegraves Caravan Park. 2 h 20 min £5. From Chelmsford taxi to Mersea Island. 39 min £109. From Chelmsford drive to Mersea Island. 39 min £5.