For the avoidance of doubt, RTT shouldn't be expected to work as normal during times of disruption because of the way National Rail provides the data. There's a bit more in the dedicated thread:
With Chiltern, units rarely get turned, they only do if they end up on a Marylebone - banbury via Oxford or the other way round There is also an ECS from Moor St to Stratford upon Avon that goes on to form the Stratford - Leamington shuttle. I do not know the full diagram so maybe the...
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I agree, use Open Train Times or Traksy to display the station and find the headcode of the train you're interested in, it'll be 1Fxx if it's a Liverpool service, this is an easier and better way to be sure of the platform. Nothing wrong with RTT but it's necessary to understand its limitations too.
RTT is initially fed information on what's
planned to happen, which is all well and good when things aren't going wrong, and RTT replaces the information which what's
actually happening when it can, but its information on planned platform usage at Euston (for example) should not be relied upon. Sources such as Open Train Times will show
actual platform occupation taken from live systems. RTT is an excellent resource and delivers lots of useful information and I find it invaluable, but I
don't use it for looking up platforms of Euston departures. I know that London-Manchester via Wilmslow services are 1Hyy with yy>=50 (today they're 9Hyy because they're going via Birmingham of course!), so it's relatively easy to identify them on live displays of actual usage.