Lots of dates, rates of pay, and codes - so this is a precis:
20 Sep 1915 Engine Cleaner
7 Dec 1917 Fireman
28 June 1937 Driver
Last entry 3 Sep 1951
20 Sep 1915 Exeter
7 Dec 1917 Cardiff
14 Aug 1920 Exeter (Own Request)
28 Jun 1937 Exeter (Temporary <something?>
27 Sep 1937 Abercynon
17 Feb 1941 Exeter. Own Request
13 Aug 1924 Commended
Keeping a sharp look out & promptly signalling to driver to stop train, thereby avoiding serious injury to a woman who had fallen on to line.
It really would be worthwhile either getting a month's subscription to Ancestry, and looking yourself! You could then take a copy of the page.
Alternatively, try your local library - they may have Ancestry access?