gladstone loco (oh mr porter)

[littlechuffer]

hello people
i was wondering does anyone have any info at all
regarding the loco 4L1 2-4-0t KESR 1899 hawthorn Leslie works no 2420/2421

better know as gladstone from the classic 1937 will hay film oh Mr porter

any info at all pics drawings etc would be appreciated
i am contemplating building a steam replica
thanx in advance
mick.