Like B158e, but new date (1st JANUARY 2019), larger fish at lower left front, new portrait engraving, new screen trap underprint, Cornerstones removed from watermark.
Curiously, this note dated 2019 has BS prefix with serial number lower than that of a note dated 2018 with BS prefix. Other 2018 and 2019 notes with BS prefix requested to determine s/n ranges.
Courtesy of Andrew Roberts.