I live in a different climate than you. Here in the desert we struggle to keep humidity up. But adding more air flow to your viv will drop your humidity (holes or a screen). You might want to check with people in your climate to see how they manage. Personally I would be happy with 73% humidity but I might be wrong and that might be wrong for the UK.
Thanks for the advice
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Originally Posted by AKA Dave
A heat lamp will do it.
Dave
Unforutnately I do not have space for a heat lamp and I already have a Heat Map so do not want to add any more heat into the viv.