I didn't find that to be true though.
I found that LW doesn't mention any guarantee for their dishwasher safe mugs - Duraglaze 10oz photo mugs: http://www.listawoodtradesupplies.co...d=LTSMU&pgnum=
On the other hand, BMS clearly state their guarantee for their 10oz RN mugs:
"We are the first company in the UK to offer a 12 month dishwasher guarantee on all our RN coated ceramic products."
https://www.printerowners.co.uk/sublimation/25/european-style-sublimation-mugs.htm
Having said that, BMS appear significantly more expensive than LW.
£99.36 incl VAT and free shipping for 72 BMS RN mugs
Compared with £70.56 for 72 LW AAA 10oz mugs (their only 10oz mugs without "visible defects or inclusions" - so clearly the only type I'd want to get!!)
Frustratingly, LW don't say whether this includes VAT or not, nor do they let you know about shipping costs.
Still I bet they are a lot cheaper. Especially if you add in the 10% discount you mention!
Just don't want to risk it given they don't (seem) to guarantee how dishwasher safe their mugs are. If you can point me to where they are guaranteeing this, that would be amazing.
And yes, in terms of getting everything for £300 - it's not going to be easy - but it's not as mad as it sounds either.
I've been amazed to find that there are stockists of BMS's Genius 1 mug press that charge almost £100 less for the same press.
I will need to shop around and negotiate, but it's looking like £300 / £350 is not impossible.