Non-yellowing gloss?

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Any suggestions for a gloss which really won't go yellow - even when they say it won't, but does?

Decorated a couple of rooms in our house back in July and noticed at the weekend that the gloss is already turning yellow. Bought Leyland Trade high gloss brilliant white as it was recommended to us, but I'm really disappointed with it.

I think it's got to do with VOCs and apparently water-based quick drying is better but thought I'd ask for some real life experiences with a decent gloss.

Cheers.

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Thanks for the replies. Given me much to think about.