Many have interpreted their 90-run loss at the Premadasa Stadium - in which they were bowled out for their worst Twenty20 score of just 80, in under 15 overs - as an ominous blow to their aspirations as defending champions here.
However, as they move on to three Super Eight matches at Pallekele, starting against West Indies on Thursday, fast bowler Finn made it clear they will be sticking to their guns.
"We don't have to do anything different than we've done," he said. "We've had one one bad game - we know that - but we move on from it."
He added: "We brush it under the carpet; we learn from our mistakes, and we get better from it."
The consolation of Sunday's defeat, and England's hapless batting against Harbhajan Singh in particular, was that it came in a fixture which had no direct consequence - between two teams who had already qualified for the next stage.
On Monday night, West Indies were confirmed as England's first Super Eight opponents, after a rainy no-result in Colombo which spelled the end of Ireland's unlucky tour. The Windies have yet to win a match, having lost to Australia in their Group B opener but recorded a superior run rate to Ireland's.
Their captain Darren Sammy spent much of last summer losing to England in all formats, but he is optimistic of gaining telling revenge. "We have a strong belief in ourselves," he said. "The first hurdle is overcome - then the real business starts.
"We've got England in our first game and we're looking to start off very well. We've played them a few times in the last few months and we believe we can go out and beat them - we have a good twenty20 record against them.
The Windies lost a one-off match at Trent Bridge in June against England in the sprint format, but a year ago drew 1-1 in a short series at The Oval. Previously, they had to watch while England won the 2010 World Twenty20 title, right under their noses, by beating Australia in the final in Barbados.
"England are defending champions, and we will not under-estimate anybody," added Sammy. "They won a tournament in the Caribbean when the wickets were also assisting spinners. So we have to go out there and bowl properly. We hope our spinners can play a big part."