Mairin Costello

0282 565 5572

Mairin graduated from Liverpool John Moores University with a Law (LLB) degree in 2009 and completed the Legal Practice Course at the College of Law, Chester in 2011.

After completing her studies in 2011 Mairin worked in law firms in the North West dealing with personal injury, clinical negligence and insurance cases.

Mairin joined us in September 2014 as a trainee solicitor and has remained with the firm having qualified in September 2016. During her training contract Mairin practiced in personal injury, clinical negligence and criminal injury compensation claims. Since qualifying Mairin has specialised in clinical negligence claims.

Mairin was also admitted as a Solicitor of the Court of Judicature of Northern Ireland in June 2017.

Outside work Mairin enjoys sailing having achieved her RYA Level 1 qualification, travelling and socialising.


What Mairin has been talking about

Mairin Costello – Trainee to Solicitor with PSG

Delay in Diagnosis

The consequences of failing to diagnose and treat sepsis

The Claim Clinic – why people choose not to make a claim

Recent cases

Ongoing Negligent Surgery and Treatment

Kind words

“I found everything excellent good understanding and informative….Service 100%….Mairin Costello very helpful and nice to deal with”.
Ms G

“Mairin was excellent throughout the case, being very professional, sensitive, keeping us updated and making recommendations. She was always on hand to help and answer any questions we had regarding the case”.
Miss M

“From start to finish has been totally amazing. I would highly recommend you guys. Thank you soooo much, excellent work”
Mrs D – Clinical Negligence client

“I found Price Slater Gawne very efficient and helpful”
Ms R – Clinical Negligence client

“A very good service at all times”
Mr D – Clinical Negligence client

Having been involved in a serious car accident, I was put in touch with Price Slater Gawne. Mairin, who dealt with my case, kept me up to date right to the end. Everything was explained so that I could understand what was happening and all queries & messages left were dealt with promptly. Living so far away from the practice, a home visit by Mairin was very much appreciated as it is often easier to talk face to face with someone instead of talking over the telephone. Should I or a family member require legal advice or help in the future I would have no hesitation in recommending Price Slater Gawne.
Mrs Y, Liverpool

An excellent standard of service – info was explained clearly and I was given good updates via email – which I preferred. I would certainly recommend this firm and I would recommend Mairin and Niall in particular.
GBP, Cheshire

Price Slater Gawne handled a recent case for me when at the age of 74 I caught my foot in a pothole and subsequently suffered a broken right shoulder; the injury was repaired with 3 titanium screws and 7 wires. I was left with 25% disablement and osteo-arthritis has recently developed. The badly degraded tarmac road was quickly made safe and the extent of my injury acknowledge. After this the Defendants became unresponsive and the claim protracted. My solicitors throughout were tenacious and committed. Eventually the Defendants appointed independent solicitors and the claim then progressed. Six days before I was due to attend a Court hearing, the matter was settled and compensation awarded; this was a very reasonable sum and will do much to provide me with assistance in my later years. I am very grateful to my solicitors, the medical expert and the barristers involved. I could not have wished for a better outcome.
Mrs JB, Leicestershire