The 21-year-old from Kent defeated Bulgarian Danny Donchev (6-86-2) 40-36 on points to secure his third win in the paid ranks.
The 147-pounder, trained by Johnny Greaves and managed by Carl Greaves, provided the second bout of the evening and his performance and vocal support warmed up the event nicely on the first show that Dennis Hobson has ever promoted in the country’s capital, in a co-promotion with Danny Maclaren.
Hennon started the four three-minute rounds contest brightly, using the jab well, throwing plenty of punches and setting a high work rate.
Midway, Donchev appeared hurt from an uppercut and took a tumble shortly after as the pair became tangled up; the ref ruled as a slip. Hennon’s uppercuts were making a statement in the opener.
In the second round, Hennon went searching for a good body shot until referee Kieran McCann was obliged to call the pair in for a reminder to keep it clean – the travelling fighter holding on too much. Hennon landed a hurtful uppercut straight after.
Donchev lunged forward aiming to land with a flurry of shots but Hennon ducked underneath the blows well. The Kent puncher landed an eye-catching five-punch combo to end the second round with.
The 40-year-old from Pleven managed to score a rare shot on Hennon’s chin in the opening segment of the third round, his only success in the fight, the home fighter replied with yet another spiteful uppercut.
Hennon continued to flick out the jab to bother his opponent and line up the bigger shots. The veteran fighter persistently doing enough to survive each of the rounds.
The last round started with a respectful touch of the gloves followed with a lively display from Hennon, immediately throwing several good combinations, displaying a variety of punches.
Donchev attempted to return fire by coming forward but took a one-two flush on the chin for his efforts.
Disappointingly, Kieran McCann calls another time out to warn the Bulgarian again for holding. Seconds later the bell rings for the end of the contest.
Hennon moved up to 3-0 with the landslide victory and plans to fight again on a Carl Greaves Promotions show in Essex on July 1st.
He said, “So many things to work on but that’s going to come with experience under those lights. I do it in the gym everyday but it’s just doing it on the big stage.
“Taking a week off out of the gym then back in again for July 1st.”
Follow George Hennon on Twitter @georgehennon12
