Don't take your foot off the gas now, rueful Hamilton warns his heir Button

WORLD champion Lewis Hamilton has warned his would-be successor Jenson Button that he cannot afford to ease off now that his goal is in sight.<br /><br />Button took another step towards his maiden title by increasing his championship lead to 15 points at Sunday&rsquo;s Singapore Grand Prix.<br /><br />But the Englishman only managed fifth place &ndash; the latest disappointing result in a season that has tailed off dramatically from a superb start.<br /><br />With three races to go Button is still the hot favourite to clinch the title, but Hamilton knows from bitter experience that it is far from over.<br /><br />&ldquo;Let&rsquo;s not forget, I was leading by 17 points with two races to go and I lost it in 2007,&rdquo; he said.<br /><br />&ldquo;It&rsquo;s very, very, very tough, right up until the last moment, so I just suggest that they all keep pushing and we will see over the next few races. But he&rsquo;s done a fantastic job up until now, so I wish him all the best.&rdquo;<br /><br />Hamilton&rsquo;s fortunes dipped dramatically at the start of the season, but he and McLaren have undergone a resurgence of late and victory in Singapore was his second in the last five races.<br /><br />He said: &ldquo;I&rsquo;m glad I&rsquo;m back at the front now, and that people can see the No1 on my car was well earned. It&rsquo;s on our car for a reason.&rdquo; <br />