Thank you Paco and Stan for your input but I was hoping that someone local to Newbury might be in a position to check the NWN at the library around the date of burial.
I subscribe to both the FNRC [Friends of Newtown Road Cemetery] and the BL Newspaper Archive but digitization of the NWN post-1872 is unlikely to be available in my lifetime, and I'm no longer physically able to make the trip to undertake the search myself.
In addition to scaling rooftops, William WESTALL swam under the bridge at Wash-water in 1869; the lad who fell through the ice in 1870 was able to calmly tread water for ten minutes until rescued. William's occupation in 1871 was Painter Journeyman, likely employed by Samuel BIDDIS, and according to another son's statement recorded in the Reading Mercury in 1876, William was also a member of the Fire Brigade.