the lugwork is similar to Thanet, but that's where the resemblance ends - even the curves in the T seem to be flipped around http://www.theracingbicycle.com/Thanet.html
can't find how long they made frames, but 50s show quite a few
After more research into this bike it may be a Deane Toseland after all...….Toseland marketed his own branded name of cycle which included the range of standard and professional bikes using his knowledge from his early years being a mechanic he put his effort into building high end racing bikes referred to as the “Deane Toseland Special” these consisted of a brazed T on the head tube of which many were custom built to the requirements of the rider.
Got this from an Aussie sight about my bike:
I would be 99% certain it is a Deane Toseland, the track ends are the same i have also seen on other Toselands and becasue it came from Australia i would say the remaining 1% makes it true.
It would have been a track bike but her ein australia , track racers drilled for brakes and they used them for both road and track racing, on the same bike.
Not everyone could afford 2 bikes so they added different wheels when riding and added a brake/s
Ive always loved Toselands becasue they have a good build quality.