Found here:
Rajaz

17 Feb 1973 Dome, Brighton
20 Feb 1973 City Hall, Newcastle
25 Feb 1973 Roundhouse, London
26 Feb 1973 Town Hall, Watford (In association with John Fenton and Watford College Union)
27 Feb 1973 City Hall, Sheffield
28 Feb 1973 Victoria Hall, Stoke

Plus one missing from the March dates:
21 Mar 1973 Town Hall, Reading

There are a number of ads and newspaper cuttings in the Memorabilia section of the Rajaz forum which might yield some more info.
Not very easy to navigate because they are not organised in date order and you have to open each one to read them properly.
Suggest we all spend a little spare time there occasionally and then gradually we will have them covered.

Cheers gth