I have, after a bit of detective work, found the timings for the routes. Note all flights are listed to run Monday to Friday, at present, and not daily as various sources have stated so far.
6G1856
dep CARDIFF 1505
arr LIVERPOOL 1550
6G1855
dep LIVERPOOL 1100
arr CARDIFF 1145
6G1850
dep PLYMOUTH 0700
arr CARDIFF 0730
dep CARDIFF 0750
arr NEWCASTLE 0910
dep NEWCASTLE 0940
arr LIVERPOOL 1030
6G1851
dep LIVERPOOL 1620
arr NEWCASTLE 1710
dep NEWCASTLE 1740
arr CARDIFF 1900
dep CARDIFF 1930
arr PLYMOUTH 2000