Instructions:Laithwaites have two voucher codes:
LINK50 - £50 off orders over £120
LINK60 - £60 off orders over £160
I ordered a bottle of Balvenie 21yo Whisky @ £125 and it worked fine on it.
Delivery starts at £7.99 or you may be able to add store collection if you stay close to one. (I am Scotland so nothing up here)