Soccer:Liverpool's principal owner John Henry has admitted the preferred option of redeveloping Anfield may not be possible as there are "so many obstacles".

The issue of whether to leave their home of nearly 120 years has been a thorny one since it became apparent the new stadium in Stanley Park promised by former owners Tom Hicks and George Gillett was never going to materialise.

When Fenway Sports Group took control of the club last October they set about reassessing whether Liverpool could remain at a redeveloped Anfield - as their baseball franchise the Boston Red Sox had done at their historical home of Fenway Park.

However, Henry has accepted there are a number of difficulties, from financial, logistical and geographical points of view, associated with revamping Anfield into a 60,000-plus capacity arena.

"Anfield would certainly be our first choice. But realities may dictate otherwise. So many obstacles..." he wrote on Twitter.

However, the club has denied a decision has already been made.

"The club's position on the stadium issue remains unaltered and no decision has been made," said a spokesman. "We are continuing to examine both the options - the refurbishment of Anfield and the new stadium in Stanley Park.

"A huge amount of work on that is ongoing and an announcement will be made in due course."

Moving to Stanley Park would overcome many of the restrictions the club currently have to work with at Anfield as a new purpose-built stadium could provide the increased seating and hospitality opportunities required to boost matchday revenue.

And, having seen Manchester City follow the likes of Arsenal in securing a multi-million pound naming rights deal for their ground, a similar route for the Reds would help offset some of the estimated €336 million building costs.

Liverpool, meanwhile, have completed the transfer of Charlie Adam from Blackpool on a long-term contract.

The Scotland international underwent a medical at the club's Melwood training ground after the two clubs agreed a deal to end the Reds' six-month pursuit of the 25-year-old.

Just over 24 hours after that medical was completed the deal was eventually finalised with Liverpool confirming the move in a brief statement on their website, accompanied by a picture of Adam signing his contract alongside director of football Damien Comolli.

"I am absolutely delighted to be here," Adam told Liverpoolfc.tv. "It has been a long process but now I can't wait to get started and hopefully this will be a successful period in my career and in the club's history.

"Liverpool is a massive club with terrific players and a terrific manager. I see this as the perfect development for me to come here, play with such wonderful players and hopefully help the team to win trophies, because that's the most important thing.

"I'm delighted to be able to walk out on the same pitch as some of the players here. There are good players at the club, top, top players who I want to learn from. I want to become a better player and hopefully bring something to the team.

"Hopefully we can have a successful period because it's been missing now for a couple of years. At the end of the day you get judged on trophies and as a footballer you want to win as many as you can. This club has had a lot of success over the years, so let's get back to doing that."

The role of Kenny Dalglish in securing the signature of his fellow Scot cannot be underestimated. He identified Adam very early on as a player he wanted and even drove the midfielder into the club's Melwood training ground for his medical.

Dalglish's influence was marked when he took charge in January, turning performances and results around, and that did not go unnoticed by Adam.

Adam added: "You have seen since the new manager came in the forward strides that have been made. Kenny has a terrific respect from players and people in the game. He is a wonderful manager and it's an honour to be able to say I'm going to be able to play for Liverpool.

"I tasted Anfield last year, scoring here (in the Seasiders' 2-1 win) was an unbelievable feeling and hopefully I've got many more days like that as a Liverpool player."

Liverpool have also agreed a new long-term contract with young defender John Flanagan. The 18-year-old made seven appearances at the end of the 2010-11 season after being given a chance by Dalglish.

And Liverpool director of football Damien Comolli is confident the full-back will justify the faith shown in him.

Comolli told www.liverpoolfc.tv: "The first thing everyone will say is he deserves it because he did so well for us towards the end of last season. Flanno had a long time left on his current deal but we felt it was the right thing to do, to reward him for what he's done.

"His attitude is absolutely terrific. As you see him on the pitch - committed, dedicated, the intensity of his game - is what he's like off the pitch. He's very professional, he knows how to look after himself and who to listen to, and I think that's why he's improved so quickly.

"He's only 18 years old and he's still got so much room for improvement in every area of his game - but he's already very good going forward, technically he's very sound. I'm sure in two years' time we'll talk about him having made even bigger progress.

"We're really looking forward to his development and seeing how he's going to do."