Do you mean here Thumper?

http://en.wikipedia.org/wiki/Wootton,_North_Lincolnshire

If so is it at The Nags head?

If its at the nags head, you need to get this reference corrected

http://www.folkandroots.co.uk/Venues_Lincolnshire.html

Scroll down and you will find that folkandroots link it to Spalding Folk Club

Is this the pub

Nags Head
Thornton Road
Wootton
Ulceby
Humberside
DN39 6SJ

Multimap http://www.multimap.com/maps/?qs=DN39+6SJ&countryCode=GB#map=53.63051,-0.35281|10|4&bd=useful_information&loc=GB:53.63051:-0.352