  As a class of compact binaries with large binding energy, cataclysmic
variables formed through close encounters play an important role in the
dynamical evolution of globular clusters. As part of a systematic search for
CVs undergoing dwarf nova eruptions in globular clusters, our 2004 monitoring
programme of M22 detected an outburst of the dwarf nova candidate CV1 during
May. We implement the ISIS image subtraction routine to obtain a light curve
for an outburst of CV1. We present the outburst light curve as well as
HST/WFPC2 photometry in the V, U and near ultra-violet (nUV) bands and a
Chandra/ACIS-S spectrum of the object. Our results confirm the DN nature of the
outburst and the CV status of the object. We also present the results of a
ground-based study of another globular cluster CV, M5 V101 - including
quiescent medium-resolution WHT/ISIS spectroscopy in the B and R bands,
displaying prominent Balmer and HeI emission, and R-band photometry.
