You can have either Lemsip or some Strepsils.. just not ones that state theyre "cough lozengers". Ask the chemist which ones are ok while youre there, but there are a few that are fine. Either that or put a 1/4 of a lemon in a cup with boiling water.. add honey if you want.. this also helps the throat.
Re the ear ache, only thing you can have until you see a dr is panadol.