Hey Capt., the Long Branch is a nice rifle and the .303 is a classic and potent cartridge. That rifle looks complete other then the stock. Does not look like the barrel was cut. Check for matching bolt serial #. I think price is a bit high but not bad. If the bore is good and I was in the market $225 is not unreasonable.
As far as head space goes, you have to use a British spec gauge as a SAMMI guage will be short. Head space is pretty easy to adjust with a bolt head change.Most every Long Branch that I have shot has been pretty accurate.
Nevada, The last free place in this country.