Explanation

Step 1: Calculate Year 2 ratios from the provided data

1. Interest Coverage Ratio (Year 2):

   • EBIT = £1,015.0 million
   • Interest Expense = £73.4 million
   • Interest Coverage = EBIT / Interest Expense = 1,015.0 / 73.4 = 13.8×

2. Debt-to-Total Assets Ratio (Year 2):

   • Total Debt = £1,048.0 million
   • Total Assets = £5,305.0 million
   • Debt-to-Total Assets = Total Debt / Total Assets = 1,048.0 / 5,305.0 = 19.8%

3. Operating ROA (Year 2):

   • EBIT = £1,015.0 million
   • Average Total Assets = £5,421.0 million
   • Operating ROA = EBIT / Average Total Assets = 1,015.0 / 5,421.0 = 18.7%

Step 2: Compare Year 2 ratios with Year 1 ratios

• Interest Coverage:

  • Year 1: 15.3×
  • Year 2: 13.8×
  • Change: Decreased from 15.3× to 13.8× (worsened)

• Debt-to-Total Assets:

  • Year 1: 18.2%
  • Year 2: 19.8%
  • Change: Increased from 18.2% to 19.8% (worsened)

• Operating ROA:

  • Year 1: 17.3%
  • Year 2: 18.7%
  • Change: Increased from 17.3% to 18.7% (improved)

Step 3: Determine which ratio indicates improvement in creditworthiness

Creditworthiness refers to a company's ability to meet its debt obligations. Key creditworthiness indicators include:

1. Interest Coverage Ratio: Measures ability to pay interest expenses from operating earnings. Higher is better for creditworthiness.
2. Debt-to-Total Assets Ratio: Measures financial leverage and risk. Lower is better for creditworthiness.
3. Operating ROA: Measures operating efficiency and profitability. Higher is generally better, but it's more about profitability than direct creditworthiness.

Analysis:

• Interest Coverage decreased (15.3× to 13.8×) → Worsened creditworthiness
• Debt-to-Total Assets increased (18.2% to 19.8%) → Worsened creditworthiness
• Operating ROA increased (17.3% to 18.7%) → Improved profitability, but not a direct creditworthiness indicator

Step 4: Why the question asks which ratio "most likely indicates an improvement"

The question is testing whether you recognize that while operating ROA improved, the two direct creditworthiness ratios (interest coverage and debt-to-assets) actually worsened. Therefore, none of the ratios show improvement in creditworthiness. However, since the question asks which "most likely indicates an improvement," and we must choose from the options, we need to consider:

• Operating ROA improvement could indirectly suggest better ability to service debt through higher profitability.
• The other two ratios directly show deterioration in credit metrics.

Step 5: Conclusion

Given that:

1. Interest coverage and debt-to-assets ratios directly worsened
2. Operating ROA improved
3. Improved profitability (ROA) could support better debt service capacity over time

The operating ROA (Option A) is the only ratio showing improvement, and while not a direct creditworthiness metric, it could indicate potential for improved creditworthiness through better profitability.

Answer: A (operating ROA)