New member question

Sorry if already posted, I've just bought a 2008 1.6 non turbo Cooper I fully serviced it and replaced the rocker cover gasket and vacuum pump seals (noticed oil around the spark plugs and underneath vacuum pump) looks like I've sorted those leaks but noticed some oil spray on passenger side air intake hose opposite vacuum pump. Anyone seen similar before and point me in the right direction to check out what might cause it. Thanks Mark