By Steve Dinneen Once again postponed because of Covid, the London Marathon is finally happening this Sunday. If you need some last-minute inspiration for gear to help you reach the next level, we have you covered. Lululemon Fast and Free Running Vest, £88, lululemon.co.ukGone are the days when running a marathon involved sticking on your favourite old pair of running shoes and hitting the open road. Today you have kit coming out the wazoo, as you can see from this page. This lightweight running vest from Lululemon will help you accommodate all your kit, from tubes of glucose to your iPhone to…