Deer populations across Britain have experienced a significant increase over the past four decades, with a notable acceleration following the COVID-19 pandemic period. Data indicate that the number of deer has roughly doubled in certain regions, leading to concerns about ecological balance, agricultural damage, and infrastructure costs. The surge in deer numbers has been primarily attributed to habitat changes, reduced hunting pressures, and increased food availability during and after the pandemic. Economically, the damage caused by overabundant deer includes crop loss, fencing repairs, and vehicle collisions, collectively costing millions annually. Management strategies, such as controlled culling and habitat regulation, have been implemented variably across different regions to address these issues, but the growth trend remains a challenge for policymakers and rural communities. The increased deer presence impacts not only agriculture and infrastructure but also biodiversity, necessitating ongoing monitoring and adaptive management to balance ecological health with economic interests.