Who are Julia and Tony in EastEnders? Sonia Fowler's sweet nod that fans may have missed

ok.co.uk:

EastEnders' 40th-anniversary episode was chock-full of drama, and the excitement didn't end with the credits! As fans eagerly jumped online at 8.30 to cast their vote on who should be Denise's love interest, they were greeted by an unexpected second poll – what should Sonia Fowler name her baby?

During the intense hour-long special, viewers watched Sonia go into labour amidst a fiery ordeal at the Queen Vic, all while Reiss Colwell met a tragic fate before her very eyes.

As Lauren Branning and Bianca Jackson rushed to Sonia's aid, Lauren enquired if she'd thought of any names. Sonia confessed she was torn between Julia and Toni ("Tony with an i").

However, it was only upon casting their vote post-episode that fans discovered the poignant tribute behind these choices.The BBC website gave a nod to EastEnders royalty, explaining: "To honour the creators of EastEnders, Julia Smith and Tony Holland, what should Sonia name her baby?" But who are these soap icons?