Lidl have got these sets of 3 spirit levels instore from tomorrow priced at £6.99 a set which seems like a cracking deal to me. 2 year warranty included.
Product Information :-
Set of 3 made from lightweight and sturdy aluminium, each with 3 vials for horizontal and vertical angle measurements at 45, 90° and 180°
Length (cm): 40 / 60 / 100
2 year manufacturer's warranty