Staff at ticket offices can sell you tickets for future dates. All TVMs should be able to do this but don't. Greater Anglia is one of few operators to support this - today and the 28 days after that. Simple to use feature. Time can be changed to buy off-peak ticket early.

@RailfuturePsngr @RailfutureEA How ever GA tries to dress it up, TVMs are not accessible to many disabled people.