The striker has netted 12 goals in 27 League One outings this season and is comfortably the Blues’ top scorer.
His efforts have been the saving grace in a underperforming side this campaign, and the 26-year-old currently sits third in the highest scoring charts in the third tier.
But how does Bishop and Pompey’s front men compare to the rest of League One?
We’ve taken a look at WhoScored.com to discover who they’ve rated as the most prolific strikers in the league.
Here’s what we’ve found.
13. Michael Smith - Sheffield Wednesday
Appearances: 23; Goals: 8; Assists: 2; WhoScored rating: 7.03. Photo: Laurence Griffiths
14. Sam Vokes - Wycombe
Appearances: 23; Goals: 4; Assists: 3; WhoScored rating: 7.04. Photo: Mike Owen
15. Jevani Brown - Exeter
Appearances: 27; Goals: 12; Assists: 9; WhoScored rating: 7.07. Photo: Michael Regan
16. Ellis Harrison - Port Vale
Appearances: 19; Goals: 8; Assists: 1; WhoScored rating: 7.13. Photo: Morgan Harlow