:[http://www.4150.org.uk/4150_news.html Information on the 2015 event on www.4150.org.uk]
:[http://www.4150.org.uk/PDFs/PeepBehindScenesLeaflet2015.pdf Downloadable 2015 leaflet]
:[http://www.svr.co.uk/pdf/Special%20Events/Peep%20Behind%20the%20Scenes%202016.pdf Downloadable 2016 leaflet]