It seems exaggerated for comedic effect, but it is technically possible under certain extreme conditions. For a £600 increase in an electricity bill, the player would have to use a device with high power consumption for an extended period. Here's a breakdown:

Gaming PC Power Consumption: High-end gaming PCs can consume around 300–600 watts while gaming. Let's assume a power usage of 500 watts for simplicity.

Usage Time: Playing continuously for long hours over a quarter (about 90 days) could significantly increase electricity consumption.

500 watts = 0.5 kilowatts Playing 8 hours daily for 90 days = 720 hours 0.5 kW × 720 hours = 360 kWh Electricity Costs: Assuming a cost of £0.30 per kWh:

360 kWh × £0.30 = £108 additional cost. For a £600 increase, you'd need much higher power usage (e.g., using multiple devices like a high-end PC, large TV, and cooling systems) or running the game nearly 24/7. It’s unlikely but feasible if they had an exceptionally inefficient setup or other contributing factors.