In 2008, I have seen the following 10 shows (including readings; multiple visits not noted; location in parentheses):
Assassins (London)
The Collection (London)
The Lover (London)
Make Me a Song (London)
The Masque of the Red Death (London)
The Merchant of Venice (Stratford-upon-Avon)
Merrily We Roll Along (Newbury)
Plague over England (London)
A Prayer for My Daughter (London)
Tough Time Nice Time (London)