(ShareCast News) - After TalkTalk revealed the extent of its cyber-attack injuries on Tuesday, the Managing Director of the FTSE 250 company's business division has thrown nearly £1.5m behind the company.Charles Bligh purchased nearly 618,000 shares in the company for £1.489m.It came after the telecoms provider said the cyber-attack had a trading impact of £15m, and created exceptional costs of £40m-£45m.TalkTalk's on-net customer churn during the three months was 2.1%, of which 0.6% was estimated to be the impact of the attack.Of the 101,000 customers lost, TalkTalk estimated 95,000 of them were due to the attack.However the company did report revenue growth of 1.8% in the three months to 31 December 2015.Shares in TalkTalk started the day well, but were only up marginally by 1606 GMT to 220p, rising 2.1p (0.96%).Top Director BuysTalktalk Telecom Group (TALK)Director name: Bligh,Charles Amount purchased: 617,978 @ 2.41pValue: £1,488,832.57Bankers Inv Trust (BNKR)Director name: Thorne,MatthewAmount purchased: 4,000 @ 5.76pValue: £23,040.00Diageo (DGE)Director name: Stewart,AlanAmount purchased: 1,060 @ 18.99pValue: £20,129.40Blue Planet Investment Trust (BLP)Director name: Murray,KennethAmount purchased: 50,000 @ 0.32pValue: £15,750.00There were no director sells at the time of publication