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We present the highest resolution single-dish submillimetre observations ofthe detached shell source U Antliae to date. The observations were obtained at$450~\micron$ and $850~\micron$ with SCUBA-2 instrument on the James ClerkMaxwell Telescope as part of the Nearby Evolved Stars Survey. The emission at$850~\micron$ peaks at $40\arcsec$ with hints of a second peak seen at $\sim20\arcsec$. The emission can be traced out to a radius of $56\arcsec$ at a$3\sigma$ level. The outer peak observed at $850~\micron$ aligns well with thepeak observed at Herschel/PACS wavelengths. With the help of spectral energydistribution fitting and radiative transfer calculations of multiple-shellmodels for the circumstellar envelope, we explore the various shell structuresand the variation of grain sizes along the in the circumstellar envelope. Wedetermine a total shell dust mass of $(2.0 \pm 0.3) \times 10^{-5}$ M$_{\odot}$and established that the thermal pulse which gave rise to the detached shelloccurred 3500 $\pm$ 500 years ago.

The Nearby Evolved Stars Survey: I. JCMT/SCUBA-2 Sub-millimetre detection of the detached shell of U Antliae