10% discounts from GLTC for MNetters - how do I get this?

[FeelingEvil]

I'm about to spend an awful lot of money at GLTC online so would like to get the 10% discount advertised on Mnet to it's members.
Is there a promotional code I have to type in? If so, can't find it.

Apologies in advance if I'm being dim and it's glaringly obvious. Can anyone help please?

Thanks Littlelapin. Doesn;t seem to be working but I think it;s a problem with GLTC site. Will give up on online shopping tonight and will try again tomorrow or Monday.

Thanks LL
I'm using Safari on an AppleMac.
Don;t have Firefox.

will give it a quick whirl again now.