Perspectives on laser-plasma physics in the relativistic transparency regime Martin King, Robbie Wilson, Ewan F. J. Bacon, Ewan J. Dolier, Timothy P. Frazer, Jack Goodman, Ross J. Gray and Paul McKenna Eur. Phys. J. A, 59 6 (2023) 132 Published online: 16 June 2023 DOI: 10.1140/epja/s10050-023-01043-2