Looks like Leslie Knox was the tea planter (See
www.findmypast.co.uk for full details)
1927 Leslie KNOX age 22 Liverpool to Colombo, Ceylon
1932 Leslie KNOX age 28 Liverpool to Colombo, Ceylon
1937 Leslie KNOX age 33 Liverpool to Cochin, India
1937 Leslie KNOX age 32 Liverpool to Colombo, Ceylon
Also 7 Nov.1936 "Derbyshire" arrived London (embarked at Conchin): Leslie Steven KNOX, age 32, tea planter; wife Annie Elizabeth KNOX, age 30; son, age 1 1/2 (name not posted as we might still be alive). Going to: Lissadell, Grangerville Gardens, Finaghy, Belfast.
28 June 1937 "Amarapoora" arrived London from Rangoon: Leslie Steven KNOX, 32, tea planter; Annie Elizabeth KNOX, 31; son (same as above), 1 11/12. Going to same Belfast address.
21 Mar.1946 "Mantola" arrived Bristol, England from Bombay, India: Leslie Steven KNOX, 41, tea planter; Annie Elizabeth KNOX, 39; son, 10 (same as above); daughter, 6. Going to 1 Lynda Park, Jordanstown, Co. Antrim, N. Ireland. Not sure where this address is- I know Lynda Ave. in Jordanstown (will be there tomorrow) but not sure about a Lynda Park.