My rear driver side brake seems to be binding or sticking is this is an easy solution to rectify

Could be a sticky caliper, seized brake pads, or a binding EPB.

Need to strip it down and check

same happened to me twice this week...

other than the usual mechanical caliper / pad / sliders issue, is there an ABS / electronic valve that could cause it ? just got out smelt burning pad looked and outer part of disc glowing red

I have a receipt for new rear calipers fitted by guy salmon 2 years ago  Why?.. Because i can....
RRS 2006 S/C Rimini Red Weekend toy
Subaru impreza 1998 2.0 340hp still here
Smart car 0.7 61 hp Carbon offset
Sierra cosworth 2.0 350 hp GONE
Various RS escorts, Vauxhall sri's Volvo T5's, BMW 3 series, fiestas (?) fiat's....
Mr Mischief - www.mischief-inc.co.uk