Changing flights in Prague

Hi, thinking of booking a flight frm London to Vilnius via Prague. I have to change flights in Prague and the connection time is only 40 minutes. Has anybody done this and is 40 minutes enough time to change terminals in Prague?

Thanks

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If you`ll check in for Vilnius from London you can catch the second flight with a little jogging IF there are no delays.

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Thanks for this. I%26#39;m not sure I%26#39;m willing to the risk of a delay. Might have to look at another airline.