Makita DSS610Z 18V Cordless Li-Ion Circular Saw BODY ONLY (NO BATT) £102.81 @ Amazon

Lovely little circular saw, if you already have the batteries. I've been using it for a couple of months, surprisingly powerful and so much easier for sheet materials.

£99.99 at UKToolMart if you want, I think they might have been banned from here for some reason as I posted something a while back and it was removed.

Lifted from a review, as there is a confusing array of versions of this saw:

"If you are trying to work out which saw to get between the BSS610, DSS610, BSS611 and DSS611 then get the DSS610. The D series is a re-badge of the B series guaranteeing or enhancing 4ah battery compatibility. The only difference between the 611 and 610 is that the 610 has light and a brake. Hence the DSS610 is the better and newer. "