Aged 12, wrote up a hit-list of people he wanted to kill.
Apart from being very colourful, there was a wonderful variety of unique configurations and many different styles of former railway companies.Aaron Barley, 24, was jailed for life in October, with a minimum term of 30 years, for killing Tracey Wilkinson, 50, and her son Pierce, 13, at their home in Stourbridge, West Midlands.He was also convicted of the attempted murder of Peter Wilkinson, 47.Instead, Mrs Justice Carr said he projected "regret that Mr Wilkinson survived his injuries".In January this year, Barley obtained full-time work and started to live in a flat in Brierley Hill, near Stourbridge.Their relationship blossomed as she helped get him a job and he described her as the "mother he'd never had".
Tracey's husband Peter, his foster dad, owned an engineering firm in South Wales.
My original aim was not to provide detailed explanations of signalling here.
Though its basic principles are simple, the details get complex and technical, so are not most people's cup of tea.
Barley then crept through an unlocked door, picked up two kitchen knives and made his way to stab Tracey and Pierce to death as they slept - before charging Peter when he returned home.
Schoolboy Pierce was stabbed with such force one of the blows "almost divided his spinal chord" and Tracey was struck with the blade up to 20 times.
My grandfather had been a stationmaster in Malvern and our whole family understood trains and signals.