Julian - correct I was using apt-cacher-ng as per sbuild instructions here https://wiki.ubuntu.com/SimpleSbuild
Sorry - I've no idea how to configure squid-deb-proxy with sbuild. So I've deleted my sbuild chroots & disabled using the .mk-sbuildrc proxy. Installing from a ppa no longer shows 503 errors.
Julian - correct I was using apt-cacher-ng as per sbuild instructions here https:/ /wiki.ubuntu. com/SimpleSbuil d
Sorry - I've no idea how to configure squid-deb-proxy with sbuild. So I've deleted my sbuild chroots & disabled using the .mk-sbuildrc proxy. Installing from a ppa no longer shows 503 errors.