Celtic boss Brendan Rodgers will already have one eye on potential summer arrivals as he continues to shape his squad at Parkhead. There has been no shortage of discussion surrounding the Bhoys’ business since the Irishman returned last summer, with plenty of his signings copping criticism for their lack of influence in green and white since joining the club. However, change may occur in that regard following news that Mark Lawwell and Joe Dudgeon have been placed on gardening leave after resigning from their respective posts. Both chiefs will have no input in planning for future transfer acti…