<text>  Mike Brown believes RFU chief executive Ian Ritchie was spot on to describe Englands RBS 6 Nations performance as unacceptable - but the Red Rose and Harlequins full back still thinks Stuart Lancasters side are genuine World Cup contenders. England were only narrowly pipped to the Championship on points difference by Ireland after a dramatic final day and have had praise lavished on them from all quarters for their attacking brand of rugby, which saw them score 18 tries in five matches. But for Brown, like Ritchie, second place is simply not good enough. Mike Brown is adamant that second place is not good enough despite Englands impressive performances . The Harlequins full back was in fine form for England throughout the Six Nations . Were not in there to be second so hes spot on really, he said. We didnt have an aim of coming second, we had an aim of winning silverware and coming first, so he hasnt said anything we dont agree with or think ourselves. We dont accept coming second because we want to win, and thats it. Brown has been forced to sit out Harlequins trip to Wembley to face Saracens in the Aviva Premiership on Saturday with concussion. If you include the Italy match, when he was taken off after being knocked out in the opening minutes, it will be the third match out of five he has missed through concussion for country and club. With no game next week though, Brown is hoping an extended break and a holiday in the sun will have him fit and raring to go for the season finale. Brown said: Its disappointing but first and foremost its about my health and with a big year coming up thats the most important thing for me and England. I got a couple of knocks right near the end of the France game and on Sunday and Monday had a little bit of a headache so were being cautious and doing the right things. I was off next week anyway, the England guys have a week off and there isnt a game so that was always the plan. So well see how I am after that, hopefully a bit of sun and a tan will cure it. Brown lies motionless after being knocked out against Italy. He was taken off and missed the Ireland game . With just six months to go until the World Cup it is a nervous time for any England hopeful but, typical of the man, Brown is adamant the only way to approach the next two months of club rugby is to go hell for leather. It can be difficult because its always in your mind, such a big goal, Brown said of balancing club and country ambitions. Ive never played in a World Cup so for me its everything, its what Ive worked towards. And the fact its in our home country adds a bit extra and we have got a realistic chance of winning the thing because of the way we are playing and the way we have progressed. Its hard not to think about but once youre back at your club the games come so thick and fast you leave it in the back of your mind and focus on just giving it your all. With five matches to go, Quins are down in eighth place in the table, nine points off an automatic Champions Cup spot and four off a play-off place. For a side that won the title just three years ago and have finished in the top four in the last two seasons, it has been a campaign of disappointment so far. But with Brown, England captain Chris Robshaw, club captain Joe Marler and veteran No 8 Nick Easter all back in their ranks from international duty for the final push, they have more than a fighting chance of salvaging it. Brown trudges off the Twickenham pitch after England were pipped to the Championship by Ireland . Attention switches to club rugby now for Brown as Harlequins look to finish in the top six . Brown says: We want to be playing at the top level of European rugby, we want to have those great nights at the Stoop, so were desperate to try and get that top six spot and we know we can do it. Whatever the outcome, next season holds exciting prospects for Harlequins with legendary Lions prop Adam Jones and former Australia captain James Horwill joining their ranks. Brown enthused: Those two guys have played at the highest level, so that sort of experience will be great for us and great for our young guys. Jones will be great for our two young tight heads Kyle Sinckler and Will Collier who are going to turn out to be two world class players. Ive heard hes a good character off the field as well so to have another guy like that to go with Minty Easter and Danny Care will be great for the squad and give it a good blend. Brown works closely with GB Wheelchair Rugby and backs them as part of the Aviva Community fund, which launched this week. He has donated all of his autumn international man of the series prize money to them in 2013 and also sells his kit viainmylocker.com to raise money for the team. It is something that is close to his heart, as he explains. I got introduced to wheelchair rugby through my future father-in-law, he saw it on the internet and thought it might be something Id be interested in, knowing the sort of fast-paced sports I like. There is a little link with my Dad as well because hes got mild MS and sometimes has to use a wheelchair. Its great to help in any way I can. Brown poses in January with GB Wheelchair Rugby duo Mike Kerr left and Chris Ryan right Mike Brown was speaking about his support of GB Wheelchair Rugby at the Aviva Community Fund launch, a nationwide initiative from Aviva, title sponsor of Aviva Premiership Rugby, which offers support and funding to causes close to your heart. Visit aviva.co.ukcommunity-fund . 