alignment issue

Hi,
Can anyone tell me how to remove the gap to the left of the Recent Posts Widget Extended widget.

It looks to be the default space you get from a <ul> when I inspected it, but despite anything I’ve tried I can’t get it to go full width.

I’ve put a grey box round my example so you can see how it jumps right.

http://www.security-fencing.co.uk/wates-construction/

https://ww.wp.xz.cn/plugins/recent-posts-widget-extended/