That is an awful non-decision from the ref. that's 3 or 4 decisions in favour of Arsenal against Brighton it begins to look corrupt.
Association football rules and regulations 6.1.2.4.5 Simulation In the event that a player feigns impedance or injury due to the actions of an opposition player, said player shall not be subject to a bookable offence UNLESS they are wearing a white shirt and navy blue shorts. PFA football commentary guidelines 6.1.2.4.5 Simulation In the event that a player feigns impedance or injury due to the actions of an opposition player, no member involved in live or post-match commentary shall state or imply the player has committed simulation, UNLESS that player is wearing a white shirt and navy blue shorts. IPCC football match reporting rules 6.1.2.4.5 Simulation A member will be deemed to have produced a biased match report by stating a player has committed simulation, UNLESS that player is wearing a white shirt and navy blue shorts.