Big Brother superfan Mario has been nominated for the first time, receiving six nominations from his fellow housemates this week.

The unemployed half-Irish, half-Italian lover of the reality TV show must now fight for survival in the Save And Replace task on Tuesday, against this week’s other nominees, Australian John James and air hostess Rachel, who received four nominations each.

Mario has faced the public vote for eviction twice already this year, when squatter Shabby and Irish student Caoimhe both chose him after winning their Save And Replace tasks.

The self-proclaimed Big Brother superfan has been branded a back-stabber by evictee Ben after he nominated the Tory writer, formerly his friend, and told him he was the most likely to be voted out by the public.

New arrival Sam was immune from nominations this week.

Katie Price lookalike Corin, Welsh minister Dave and boxer JJ received no nominations from their fellow housemates.

According to bookmaker William Hill, Corin is favourite to win the last ever series of the Channel 4 reality show, with odds of 13/8.

Australian contestant John James is second favourite to win with odds of 5/2, with Bristol blonde Josie, with whom he is conducting a Big Brother romance, placed third favourite to win, at 4/1.