Lucy Beale killer: Bobby Beale and Jane Beale murder suspect favourites on EastEnders live

Bookies have placed odds of 3/1 on both characters ahead of tonight's reveal

Lucy Beale in EastEnders - but who killed her? (BBC)

Tonight will see the mystery of who killed Lucy Beale finally solved on EastEnders live, with her little brother Bobby favourite to be revealed as the murderer.

Last night’s episode put dad Ian and his new wife Jane in the firing line, but latest odds suggest it is the youngster who committed the fatal crime last Easter. Lauren Branning revealed that she knew Lucy was killed at home in a letter sent to Jane before her wedding, putting family members in the spotlight.

Bobby and Jane are currently leading the field at Betfair with odds of 3/1, while Ian Beale is at 7/1.

Ben Mitchell is also being touted as the killer with odds of 11/2, after he interrupted a shifty conversation between Ian and dad Phil, while Cindy and Peter Beale are at 7/1 and 8/1 respectively.

The Beale family at happier times (BBC - Photographer: Kieron McCarron)

There was a flood of bets on Abi Branning on Tuesday after her dad Max blurted out that Lauren “knew she killed Lucy” (a line that many viewers could not make out clearly), putting her at 9/1.

Abi Branning and Max Branning in Tuesday night's EastEnders (BBC)

Bookmakers are concerned that a plot leak is responsible for a surge of bets on outsider Billy Mitchell. Thousands of pounds have reportedly been put on the character, causing his 80/1 odds to collapse to 7/1 and making him an unexpected favourite.

Elsewhere, some punters believe a character who no longer regularly appears in the show will be the culprit, with Grant Mitchell on odds of 14/1 after being hotly-tipped to make a comeback in the live episodes.

Rank outsiders include Kim Fox at 125/1, Dirty Den Watts at 100/1, Janine Butcher also at 100/1 and Dot Cotton at 80/1.

EastEnders returns for two episodes this evening at 7.30pm and 9.25pm on BBC1.