While I have ordered in the hundreds of £'s, the seller has always done low value gift and there's never been a problem - but the packages were small.. I don't think there's anything I could add that would be any use considering the size and weight of this shipment though..
Once had someone send me a coupla hundred quids worth of bike carbs from the US, the correct value was quoted for customs but he'd labelled them as used parts which apparently doesn't attract import duty..