  We have compiled the most complete compact and ultracompact HII region
catalogue to date via multi-wavelength inspection of survey data. We utilise
data from the recently available SASSy 850$\mu$m survey to identify massive
star forming clumps in the outer Galaxy ($R_{\rm{GC}}>8.5$ kpc) and cross-match
with infrared and radio data of known UC HII regions from the RMS database. For
the inner Galaxy sample ($R_{\rm{GC}}<8.5$ kpc), we adopt the compact HII
regions from previous works that used similar methods to cross match ATLASGAL
with either CORNISH or RMS, depending on the location within the Galactic
plane. We present a new UC HII region catalogue that more than doubles the
original sample size of previous work, totaling 536 embedded HII regions and
445 host clumps. We examine the distance independent values of N$_{\rm{Ly}}/$M
and L$_{\rm{bol}}/$M as proxies for massive star formation efficiency and
overall star formation efficiency, respectively. We find a significant trend
showing that L$_{\rm{bol}}/$M decreases with increasing $R_{\rm{GC}}$,
suggesting that the overall star formation per unit mass is less in the outer
Galaxy.
