Background: Telehealth for paediatric speech and language therapy became one of the most salient modes of service delivery during the COVID-19 pandemic. Evidence for speech and language therapy services via telehealth in comparison to face-to-face delivery demonstrates promising outcomes, and studies have begun to explore practitioner and client experiences. However, across the literature, many critical elements of services are overlooked, and there is a need to frame the evidence base within a theoretical model that can draw out practical implications that consider the range of factors having an impact on clinical implementation in real-world contexts. The APEASE (Acceptability, Practicability, Effectiveness, Affordability, Side-effects, and Equity) criteria offer such a model. The current study explored practising UK speech and language therapists' (SLTs) clinical experience of telehealth through the lens of the APEASE criteria and aimed to identify recommendations for future service provision from the practitioner perspective. Methods: An online survey structured using the APEASE criteria was developed in collaboration with the UK Royal College of Speech and Language Therapists. Quantitative data were analysed using descriptive statistics and qualitative data were analysed using reflexive thematic analysis. Results: Four hundred and thirty-eight qualified and practicing UK paediatric SLTs completed the survey. Telehealth was broadly acceptable and practicable to SLTs yet there remains some uncertainty about its efficacy and cost-effectiveness compared to face-to-face interventions and how equitable it is for different population groups. SLTs reported that effective implementation of telehealth services was dependent upon several contextual factors; affordability was a perceived barrier to clients having access to telehealth resources, intervention via telehealth was perceived as more acceptable than assessment, and whilst many SLTs welcomed aspects of telehealth, there were concerns about the physical and mental health consequences for practitioners. Six themes for the future development of telehealth in paediatric speech and language therapy were identified: (1) balanced and tailored services; (2) technology and equipment; (3) information and communication; (4) capacity building; (5) monitoring and evaluation; and (6) leadership and governance. Conclusions: Outcomes highlight promising, concerning and uncertain aspects of telehealth in paediatric speech and language therapy. SLTs value a flexible and tailored approach to service delivery and recommend that effective leadership, clear communication, ongoing policy and guidance development, upskilling of users and careful evaluation of impact are required to ensure optimal implementation. The APEASE criteria offer a valuable opportunity to enhance and streamline practice and research to ensure sustainable implementation of telehealth in the paediatric speech and language therapy services of tomorrow.