Yes, it got a motherboard, the whole point of SFF (Samll Form Factor) machine, but the model you selected is rather old model, you may find better ones (better price) in shutle's UK dealer such as click here.
You may consider SN45G instead if you have video card. Compare with other "normal" big PC, Shuttle is relatively quiet, but there are many measures which can make it a really quiet machine. One of them is to use their silent X PSU, maybe you could check if SN45G that on sale has the new 250W silent PSU or not, otherwise you could get a separate one for £40.
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