Celtic squad was boosted for the rest of the campaign.Vasilis Barkas, David Turnbull, Albian Ajeti were signed on deals worth around £13million, while loan moves were tied-up for Mohammed Elyounoussi, Shane Duffy and Serie A star Diego Laxalt.And the manager paid tribute to recruitment chief Nick Hammond and the unsung heroes who make the moves happen.Lennon said: “Nick has done a great job.