Savers are being urged to act quickly to secure better interest rates as savings returns continue to fall. According to Moneyfactscompare, easy access accounts now average 2.77%, down from 2.84% last month, following the Bank of England's base rate cut in February.

However, some providers still offer up to 7.5% on savings accounts and up to 5.6% on Cash ISAs, but many savers are missing out. Research from Yorkshire Building Society found that nearly 6.9 million instant access Cash ISA accounts in the UK earn 1.50% or less, reports .

Harry Walker, senior savings manager at Yorkshire Building Society, said: "It's surprising to see such a large amount still sitting in low-paying ISA accounts after a period of significant increases to savings interest in the last two years. This data follows on from our analysis earlier in the year calling for consumers to take time to review their finances."

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He added: "The start of a new financial year provides the perfect opportunity to review finances and switch from low-paying accounts. Savers should act and consider how they can make their hard-earned cash stretch as far as possible."

Here is a list of the top-paying savings accounts available at the time of writing, based on Moneyfacts data.

Here are the top 10 easy access cash ISAs this week:

• Plum - 5.6% AER
• Trading 212 - 5.6% AER
• Moneybox - 5.56% AER / gross
• Chip - 5.55% AER / gross
• Tembo Money - 4.8% AER
• Monument Bank - 4.76% AER / 4.66% gross
• Moneybox - 4.57% AER / gross
• Kent Reliance - 4.56% AER/ gross
• Charter Savings Bank - 4.55% AER / 4.46% gross
• Buckinghamshire Building Society - 4.53% AER

Here are the top 10 Cash ISAs with a one-year fixed rate this week:

• UBL UK - 4.53% AER
• Charter Savings Bank - 4.51% AER / gross
• Vanquis Bank - 4.51% AER / gross
• Aldermore - 4.45% AER
• Kent Reliance - 4.41% AER / gross.
• United Trust Bank - 4.41% AER
• Castle Trust Bank - 4.4% AER
• Hodge Bank - 4.4% AER
• LHV Bank - 4.4% AER
• Paragon Bank - 4.4% AER.

Here are the top 10 easy-access savings accounts this week:

• Revolut Ultra - 5% AER / gross
• Chip - 4.76% AER / gross
• Atom Bank - 4.75% AER / 4.65% gross
• Chase - 4.75% AER / 4.65% gross
• Monument Bank - 4.75% AER / 4.65% gross
• Kent Reliance - 4.64% AER / gross
• Vida Savings - 4.63% AER / gross
• Charter Savings Bank - 4.59% AER / 4.5% gross
• Sidekick Money - 4.59% AER
• Oxbury Bank - 4.58% AER / 4.49% gross

Here are the top 10 regular savings accounts this week:

• Principality BS - 7.5% AER / 7.36% gross
• First direct - 7% AER/ gross
• The Co-operative Bank - 7% AER/gross
• Melton BS - 6.5% AER / gross
• Nationwide BS - 6.50% AER/gross
• Lloyds Bank - 6.25% AER/gross
• Vernon Building Society - 6.25% AER/ gross
• NatWest - 6.17% AER / 6% gross
• Royal Bank of Scotland - 6.17% AER / 6% gross
• Market Harborough BS - 6% AER/gross

Here are the top three savings accounts with a one, two and three-year fixed rate this week:

One-year fixes:

• Al Rayan Bank - 4.7% Expected Profit Rate (EPR)
• DF Capital - 4.7% AER / gross
• Family Building Society - 4.67% AER / gross

Two-year fixes:

• Gatehouse Bank - 4.65% EPR
• Secure Trust Bank - 4.59% AER / gross
• Birmingham Bank - 4.58% AER / gross

Three-year fixes:

• Gatehouse Bank - 4.65% EPR
• Secure Trust Bank - 4.58% AER / gross
• Birmingham Bank - 4.57% AER / gross