Angel is a Health Psychologist and Sport and Exercise Psychologist, registered with the Health and Care Professions Council (HCPC) and Chartered with the British Psychological Society (BPS).

Her research, teaching, training and practice centres around the interplay between health psychology and public health. With a career that has spanned over 20 years in health psychology and behavoural science, Angel's expertise focuses on optimising health and wellbeing through behaviour change interventions and ‘moving medicine’. Specifically, her research applies behavioural science to understand and intervene with factors that influence behaviours that impact on health, illness and the health care system. It spans multiple populations (children, adults, health professionals), behaviours (physical activity, eating behaviour, medication use, health care communication), experiences (death, food insecurity), and health outcomes (obesity, diabetes, cardiovascular disease, anxiety, depression), with the connecting thread being the application of health psychology to optimise physical health and psychological wellbeing.

Angel has authored over 190 peer-reviewed publications and reports, and has been awarded over £11million in research income, extending pragmatic science in areas such as physical activity and sedentary behaviour interventions, obesity and diabetes prevention and treatment, health professional prescribing and referral behaviour, medication adherence, bereavement, and the application of the Behaviour Change Wheel in real-world practice.

She co-founded the Health Psychology in Public Health Network (HPPHN), which during her term as Chair, became the Behavioural Science and Public Health Network (BSPHN), hosting a national strategy that promotes the role of health psychology and behaviour change in improving population health and wellbeing. She is the Past Chair of the BPS Division of Health Psychology (serving as Chair 2019-2021), co-founder of the Health Psychology Exchange (HPX) and the Health Psychology Trainee Network (HPTN), led the BPS COVID-19 Behavioural Science and Disease Prevention Taskforce and was the UK National Delegate for the European Health Psychology Society (EHPS) from 2011-2018. In these roles, Angel has promoted professional identities, and supported networking, research, practice and mentoring opportunities. She has co-produced evidence-based policy briefings using the Behaviour Change Wheel approach, and championed funded training and career pathways in applied health psychology, co-producing recruitment materials that have been shared with international colleagues to advocate for roles in their respective countries.

Angel began her training at the University of Luton in 1996 as a first generation student. She continued to study for her MSc in Health Psychology, and became a member of staff during her PhD, first as an hourly paid lecturer and then as a Lecturer in Health Psychology from 2004. She left the University of Bedfordshire in 2012 to join the UCL Centre for Behavioural Medicine, situated within the School of Pharmacy, Department of Policy and Practice. She retained an hourly paid role with the University of Bedfordshire, teaching in the School of Sport and Physical Activity where she re-joined as a Reader in 2016. As Reader, she went on to develop the Centre for Health, Wellbeing and Behaviour Change, within the Institute for Sport and Physical Activity Research (ISPAR) where she became Director of ISPAR and Professor in Health Psychology and Behaviour Change. She retained an Honorary Senior Lecturer position at UCL, and returned in 2022 on a spilt-fraction post between UCL Centre for Behaviour Change (CBC) where she was the Co-Director and the University of Bedfordshire.  After a successful grant application, in September 2023 Angel transitioned from her role at UCL as Co-Director of the CBC, to focus on her role as Co-Director of the NIHR-funded Policy Research Unit (PRU) in Behavioural and Social Sciences, leading both a University of Bedfordshire- and UCL-hub to work with government agencies and policy partners.