We flag down the last and only later train of the day - the 1524 AGA service - and travel to Reedham Norfolk, arriving at 1531 Thursday afternoon
I'm not so sure it is allowed unless forced by lack of onward transport:
You shouldn't wait for more than two hours after the first available service (to any destination) has left, after allowing for the minimum interchange time
Admittedly it is sometimes difficult to tell what the first available service is (as in the case of Chichester/Ringwood a page or so back), sometimes easier (as in the case of Greater Manchester, Brighton or London which have a comprehensive night bus service.)
So if we are going to say that after a certain time in the evening you don't have to keep travelling, that needs to be made specific and a time defined.
We miss on bus by a minute and we wait for the 21:11 Ipswich Buses no 12 service to Tower Ramparts Bus Station Arriving there at 21:24 Thursday Evening
The timetable I'm using (Dated 31/08/2014) Shows this service as arriving at Martlesham Heath (Tesco) At 22:25.
Walking to the bus stop outside British Home Stores, we next board the 1722 Stagecoach in Warwickshire service X16 to Warwick (On Priory Road adjacent to Yeoman Close) that arrives there at 1742 on Friday afternoon.
From nearby Guy Street, we then board the 1812 Stagecoach in Warwickshire service X17 to Green Lane (Cannon Hill Road), arriving there at 1902 on Friday evening.