Fraser Forster will not be allowed to go on cheap in January, warns Celtic manager Neil Lennon There is, in any case, no vacancy in the Premier League which might suit Forster. "Not for the type of money we are looking for," said Lennon. It depends on whether people are willing to pay. We will be looking for a significant figure for him because we value him very, very highly. He's one of our big players and has been for the last few years. If bids do start coming in for him eventually, we will take them on their own merits. You have to take the player into consideration as well. Hopefully he will be on that plane to Brazil - I'm pretty confident he will be and that would be fantastic for Fraser. However, asked if Celtic would be prepared to let Forster go at a discount, Lennon retorted: "Absolutely not." In the meantime, Thursday's game at Perth is Celtic's 56th fixture of 2013. It is a measure of our success when you play that amount of games. I know I keep banging on about it but it does takes its toll after a while," said Lennon. It is a very important period we are coming into now. We have two very difficult away games now to St Johnstone and Inverness. Looking into the new year and the second half of the season and Champions League qualifiers as well, we are endeavouring to bring in new bodies - obviously quality as well. We need an injection of that. I am really pleased with the players who have been around this league for three or four years because they have played a huge part in why we have done really well, but the squad needs a jag now and again. These players like to see fresh players coming in. It gives them a lift too. It is now expected that Joe Ledley and Georgios Samaras will depart in January, although Scott Brown hinted that the pair might yet be retained. "I think Sami wants to be here and so does Joe," said the Celtic captain. Sami has been here six years and I'm sure he wants to stay. I know he wouldn't miss the bad weather, but my banter makes up for it. I sit right next to him in the dressing room, so that must have made him happy for the last six years. Sami is the most relaxed guy in the world. So chilled out. Honestly, if you told the big man the world was coming to an end that night, he'd say, "Well, it's been a good day, eh?" Look at what he did for us in the Champions League last season. He pretty much carried us with five away goals - no one has ever done that at Celtic. Off the field, fans will be allowed banners inside McDiarmid Park despite an earlier prohibition, although Police Scotland announced that it would carry out what it calls "a rigorous search policy" in order to prevent flares being smuggled into the ground. On Monday Celtic announced that St Johnstone had agreed that banners could be take into the game, only for the Perth club to say they knew nothing about the development. It transpired that Celtic's security officer had mistakenly phoned his Inverness Caley Thistle counterpart - who has the same name as his St Johnstone equivalent - and been told that there would be no problem. "I think there might have been a bit of sherry flowing - tis the season to be jolly," said Lennon. They mixed up the names in the phone book. It would be nice to see some colour - as long as there is none of the sinister stuff like pyrotechnics or flares. We want it to be an occasion and an atmosphere. The colour and the flags add to that, but I'm not keen on flares or anything that can be harmful to people on the pitch and off it. And, in what might be a harbinger of developments in social media, Lennon has closed his Twitter account. I wasn't getting anything out of it anymore. There were longer breaks between tweets and I just felt it was time to wrap it," he said - via the enduring custom of speaking to reporters.