Pension funds and specialist investors have agreed to a &pound;66.3m deal for 10 per cent of debts linked to the M25 motorway expansion,&nbsp;The Telegraph&nbsp;has reported.<br /> <br /> Four years after the addition of extra lanes to London&rsquo;s motorway was completed, funds and investors, including Dalmore Capital (an independent fund management company), have teamed up to take over from the engineering firms that built and maintain the extended motorway.