Fly half Dan Mugford gave London Scottish’s Championship survival hopes a boost as his five penalties proved decisive in a 20-16 win at Esher on Saturday.
Mugford – recently returned from injury – capitalised on the hosts’ poor discipline as head coach Simon Amor’s men avenged a 24-14 defeat at Molesey Road last month.
Exiles winger Gerard Mullen scored his side’s only try in a game refereed by international official Wayne Barnes.
Scottish host Moseley on Sunday with Amor pointing out home advantage could prove crucial.
“The boys get a real lift when they hear the crowd. It is that 1 per cent that will help get us over the line,” he said.