Edddie51
After checking I find the caution can be classed as spent as early as 3 months after issue. If this is true, he may well have been "let off with a caution."
Quote:-
Per the Rehabilitation of Offenders Act 1974, simple cautions, reprimands and final warnings become spent (meaning that they do not need to be disclosed, unless applying for particular types of work) immediately, and conditional cautions become spent after 3 months.
Although cautions can show up on CRB checks, records may be removed after five years, although they are often retained longer or indefinitely in practice.