Yes you could do that and pay £569, but the $599 (~£460) (+p&p) offer is still up on Indiegogo so I think that might be a better bet.
It is still uncertain (at least in some countries) what kind of rights/warranties you have as a "backer", and you usually have to pay VAT on top of the price on the Indiegogo version too. So it might be a better deal to get it from Clove anyhow (at least you should get the UK-VAT refunded/deducted). But be aware that they are offering only UK keyboard and UK power-plug (and not the full range, as they had hoped to do).
For the extra 30£ you could also by it from Planets store, and get accessories as well at the same time....