Partner, Clinical Negligence
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Partner, Clinical Negligence

Niall Costello

Niall, a member of the Law Society Clinical Negligence Panel, is an acknowledged expert in his field, with more than a decade of experience acting on a full range of complex clinical negligence cases on behalf of both adults and children, including sepsis, brain injury, spinal injuries and injuries sustained during birth.

In recent years he has developed a well-deserved reputation for his knowledge and expertise in cases where there has been a delay, or a failure to diagnose, cancer, often resulting in a fatality, and in orthopaedic cases where there has been a delay, or failure to diagnose an injury, often resulting in the client suffering permanent disability.

“These are cases where the central tragedy is that the outcome was entirely avoidable,” says Niall. “That’s why clients want someone who will fight for them, have their back, and help them, and their families, move forward with their lives.”

Niall is appreciated by his clients not just for his tenacity and deep knowledge of clinical negligence, but also for his empathetic and sensitive attitude, and is often praised for his clear advice and meticulous approach to cases.

A solicitor advocate, he represents clients and their families in court hearings and inquests and is acknowledged to be a highly effective litigator; he is also qualified to practice as a solicitor not only in England and Wales but also Northern Ireland.  Over his career he has achieved millions of pounds in settlements and is tireless in his determination to deliver the best possible outcome for his clients.

What others say

“I would like to say how impressed I have been with Niall’s handling of my medical negligence claim. Niall was always honest and upfront about what I could expect and his advice was second to none. Nothing was ever too much trouble for him and he was thorough, personable, approachable and professional throughout the process. I would have no hesitation in recommending Niall and PSG to anyone who requires a highly knowledgeable and professional solicitor, who will do their utmost to secure a good outcome.”

“I cannot express how happy I am that I decided to use Price, Slater and Gawne for my medical negligence claim. I have just received a successful settlement thanks to Niall Costello’s hard work and the team at Price Slater Gawne.”

“I cannot thank Niall Costello enough for all the hard work he has put into my case, not only was he kind, considerate, passionate about my case. He was a total professional, well informed and understanding about my case and my medical condition, he would be quick to inform me of any developments. This has been an incredibly difficult time on a personal level, I felt really looked after by your organisation. I would highly recommend you without a second thought. Thank you all for all that you have done for me.” Ms.C

“Everything from our first enquiry and meeting was professionally handled and all options were explained.  We were treated in a caring, friendly and professional manner at all times.  No stone was left unturned to achieve an excellent result.  We really could not have got a better team to act on our behalf.” Mr.O

“I thought the case was a difficult case to win but Price Slater Gawne could see that the case had merit and acted. Three and a half years’ later I received a letter of apology and a case settlement.” Mr M

“I am extremely happy with the service provided and would thoroughly recommend Price Slater Gawne. From start to finish I was fully informed and supported during the court hearing.” Mrs B

“An excellent standard of service – information was explained clearly and I was given good updates. I would certainly recommend this firm and I would recommend Mairin and Niall in particular.” GBP

“I just wish to say thank you very much for all your help and advice, from beginning to end, especially to Niall Costello. I had very good advice and help all the way.” Mrs AH

“Niall drives a hard bargain! He gets great satisfaction from obtaining worthy settlements for his clients.”

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