So long as the National Rail app is accurate you will. They did exactly the same thing to the 17.33 on Tuesday. Having told the OH I'd be late I then had to eat humble pie as I picked up my original train at Barnham :facepalm:
On my train app it is only cancelled as far as Emsworth. If you change at Barnham it will leave there at 16.33 and carry on from there on time. It's the 17.10 from Portslade, one of the ones I originally had on alert and it's not cancelled from there.