OTT provides training resources to the travel trade, running programmes for tour operators, airlines, cruise lines and destinations, among others.
An automated response from managing director Julia Feuell’s email address confirmed the news.
"It is with deep regret that OTT has ceased trading," read the response, which confirmed business rescue and insolvency specialists McTear Williams and Wood were in the process of being appointed "to wind up the company".
The response added anyone with queries should contact Luke Carless at McTear Williams and Wood by email on lukecarless@mw-w.com.
