Dylan Hartley's England hopes in jeopardy after citing for allegedly striking Rory Best A ban would leave him in danger of lacking game time in the run up to the Six Nations ahead of the selection process for the Lions, with his biggest challenge for the jersey likely to come from Best. Northampton travel to Belfast to face Ulster on Saturday and have two other Heineken Cup matches next month against Castres and Glasgow. If Hartley is found guilty, his hopes of having any ban reduced for mitigating factors are also likely to be hindered by his poor disciplinary record. Hartley was banned for 26 weeks in April 2007 for an eye-gouging offence and was suspended for eight weeks in March for biting the finger of Ulster flanker Stephen Ferris during England's victory over Ireland at Twickenham. Meanwhile, Jonny Wilkinson, the former England fly-half, is ready to extend his career at Toulon after declaring "everything is perfect" at the French Top 14 club. The 33 year-old, who retired from the Test arena last December in the wake of England's poor World Cup campaign, has flourished at Toulon to such an extent that Lions coach Warren Gatland is considering him for next summer's tour of Australia. Wilkinson's current contract, believed to one of the most lucrative in France, expires at the end of the season, but reports in France suggest he plans to negotiate a longer stay. "I have never been as happy as I am to play for Toulon," Wilkinson told French newspaper Midi Olympique when asked about his plans beyond this season. Wearing the colours of RCT, representing the region of Toulon is the most beautiful thing in my career. But my decision will be based on what is good of the team. The atmosphere within the group is fantastic, perfect and I am enjoying myself. Currently, Toulon is perfect for me. The coach, the team, everything is perfect. Toulon, who were beaten in the Top 14 and Amlin Challenge Cup finals last season, are the form team in France this year and will be strong contenders for a league and Heineken Cup double. Such has been Wilkinson's impact, the former Newcastle fly-half, has also been coaching at the club, that they are thought to be keen to extend his stay if a deal can be reached. His next focus however is on Toulon's return Heineken Cup fixture against Sale Sharks this weekend after his 12-point haul helped the French side to a 17-6 victory at the Salford City Stadium last Saturday. Meanwhile Ireland wing Simon Zebo is expected to be fit to take his place in the Munster side for their Heineken Cup match against Saracens at Vicarage Road on Sunday. Former Lions captain Paul O'Connell however is expected to be ruled out of contention for Munster until January because of a long-standing back injury that ruled him out of Ireland's autumn campaign. The second-row is thought to be considering an operation in an effort to clear up the problem. Scott Johnson remains the favourite be appointed to the role of Scotland's interim coach for the Six Nations Championship following the resignation of Andy Robinson. Johnson, who was appointed as the Scottish Rugby Union's director of coaching at the end of last season's campaign, is thought to be in line to take temporary charge to give the Scottish Rugby Union more time to consider who should replace Robinson on a permanent basis. The interim appointment of Johnson, who is respected by the squad, however, would put him in pole position, in a similar fashion to Stuart Lancaster with England last season, to prove he is the right candidate to lead Scotland to the 2015 World Cup.