Barclays, despite benefiting from higher interest rates that increased mortgage costs and income this year, faces a highly competitive savings market with higher savings rates and increased volatility in financial markets. This resulted in a 6% drop in UK deposits due to customer migration seeking higher returns. Consequently, Barclays UK is not anticipating any deposit growth in Q4, leading it to lower its net interest margin (NIM) forecast. Additionally, InvestingPro Tips notes that the bank's revenue growth has been slowing down recently, and it suffers from weak gross profit margins, which may further exacerbate these challenges. Adding to the bank's challenges is a 6% year-on-year fall in income from its Corporate and Investment Banking Division due to market volatility. The bank also increased its credit impairment charges to £433 million, up from £381 million last year.