Harry Johnston-Sluka


About Harry Johnston-Sluka

Harry qualified as a solicitor in April 2021 and completed his training contract at Invicta Law. Harry works on matters involving adult social care, inquests and asylum. ​

Harry advises local authorities on responding to referrals of potential UAS Children to the local authority for age assessments, on conducting age assessments and applicable case law for these assessments and frequently advises on and responds to pre-action letters seeking to judicially review local authority decisions in relation to age assessments and levels of support being provided to UAS Children and care leavers. Harry also acts on behalf of local authorities in Judicial Review claims brought by UAS Children challenging their age assessments or decisions around local authority support provided to asylum seekers. ​

Harry delivers training to local authorities on their duties towards UAS Children, age assessments, the national referral mechanism for victims of modern slavery and on conducting human rights assessments lawfully and withdrawing care leavers’ support from failed adult asylum seekers. ​

Regarding adult social care matters, Harry frequently advises on the law regarding mental capacity and deprivations of liberty and has conduct of cases in the Court of Protection including welfare applications, s21A Mental Capacity Act challenges and applications for the authorisation of deprivation of liberty for adults and children. Harry also acts for local authorities in Coroners’ inquests. ​

Previously Harry has represented local authorities in a range of other areas including Civil litigation, Employment, Planning and Highways and Child Protection.

Areas of expertise

  • HRA
  • Age assessments
  • Pathway plans
  • UASC
  • Leaving Care
  • NRPF
  • Pre-Action letters and Judicial reviews
  • Legislative changes
  • Court of Protection
  • Inquests
  • Deprivation of Liberty Safeguards
  • Mental Capacity Assessments
Harry is commended by clients for his helpful and responsive approach to legal advice.

Client testimonials

“I am really grateful for your pragmatic approach to this case and well done on achieving such an excellent result for us. ”
Monitoring Officer
“Kent County Council’s 18+ service is supported by the Invicta Law asylum team providing impeccable legal advice in assisting our service to support asylum seeking care leavers in Kent.”
Leaving Care Service - Kent County Council
“The Unaccompanied Asylum Seeking (UAS) Children’s Service is grateful for the support your team provides in defending its age assessments and responding to UAS child-related legal matters. I and the Service look forward to working with you in 2024-25.’ ”
UAS Children’s Service - Kent County Council
“South East Strategic Migration Partnership (SESPM) have worked successfully with Invicta Law over a number of years and their support, advice and training has been a key element to our work in this field. They have offered value for money training which has received extremely high levels of positive feedback from participating local authorities in the South East. Our experience is that the advice and training, especially related to Age Assessments and undertaking Human Rights Assessments, has been particularly helpful for local authorities here. ”
South East Strategic Migration Partnership
“The service so far has very good feedback for both of your case holders assisting. We thank you again for your supplemental service to Lambeth ASC at this very busy time for our in-house legal team.”
Community Care - London Borough of Lambeth
“The services we have had from Invicta Law have been excellent, both from the legal discussions but also the support we have received to increase my staff’s knowledge of the age assessment process. There have been times during some of our most challenging periods when I have communicated with members of your team at weekends and out of office hours, and the colleagues we have worked with have gone above and beyond in helping us in Torbay.”
Children's Services - Torbay Council
“I am writing in praise of your support. As someone in the firing line of an ultra-aggressive legal team for the first time in my life, this was a traumatic and, at times, upsetting process. You were at my side, dispensing wise and calming counsel throughout. You have been readily available when crises occurred, have been a wonderful listener and, in the end, we reached an outcome that was highly satisfactory for our school and its pupils. I cannot speak highly enough of the way that you handled this case, and I thank you and your firm for the support you gave me. Being a chair of governors, sworn to confidentiality, can be a lonely business! You kept me sane.”
Chair of School Governors
“You’ve been incredibly helpful with this. Thanks for always replying so promptly and for being a star.”
Private Sector Town Planning & Development Consultancy
“The experience has been really top end. Rather than just offering the options, they have given some real solid advice on the best route. It's a good business 'partnering' approach.”
Kent Fire and Rescue Service
“Their employment advice has always proved to be sound. I’ve worked with lots of different lawyers in London boroughs and I’d also say that Invicta Law is the most solution-focused.”
Kent Fire and Rescue Service

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