Chock-A-Block [SEP] creator
Chock-A-Block
Chock-A-Block is a BBC children's television programme, created by Michael Cole and Nick Wilson. It was first shown in 1981 and repeated through to 1989 and shown as part of the children's programme cycle "See-Saw" (the "new" name for the cycle originally known as "Watch with Mother"). "Chock-A-Block" was an extremely large yellow computer, modelled to resemble a mainframe of the time; it filled the entire studio
shock to the vehicle involved.
Chock block.
A cheap and simple alternative to catch points or a derail is a chock block, which is a piece of timber that can be positioned and locked over one of the rails at the end of a siding to protect the main line from runaways. In order for the siding to be used the chock block must be removed.
Effectiveness.
Because catch points are rarely needed, it is not always clear whether they will in fact derail a runaway train effectively and