  We present 850micron imaging polarimetry of two high-mass star forming
regions - W48 and S152. Within these regions we have identified two candidate
high-mass protostellar objects - W48W and S152SE. The submillimetre continuum
emission from the candidate HMPOs is bright in comparison to the nearby HII
regions. W48W is a cold dense source, with no radio or mid-infrared emission.
S152SE has an IRAS source IRAS 22566+5828 in the Southwestern part of the
region, which appears in the mid-infrared 8.28micron emission, but there is no
radio emission. The 850micron data shows another core within the region, in the
Northeast. The polarimetry is ordered and the degree of polarisation is high
over the candidate HMPOs - ~6% for W48W and ~8% for S152SE. Polarimetry results
of this nature indicate a strong, ordered magnetic field threading the
candidate HMPOs. The magnetic field direction in both S152SE and W48W is
perpendicular to the direction of elongation of the cloud which would imply
collapse along the field lines. Estimates of the magnetic field strength are
derived using the Chandrasekhar & Fermi method. We calculate plane of the sky
field strengths of ~0.7 mG for W48W and ~0.2 mG for S152SE. We discuss the
drawbacks of using the Chandrasekhar & Fermi method with a large beam size.
Mass-to-flux ratios have been calculated and both clouds are found to be
roughly critical.
