Savers must act quickly to secure higher as returns continue to fall. Research from Moneyfactscompare shows a downward trend in rates following the base rate cut in February, with easy access accounts now averaging 2.78%.

However, some providers are still offering up to 7.5% on savings accounts and up to 5.71% on Cash ISAs, though many savers are missing out. New research from Spring, a savings app owned by Paragon Bank, estimates that Britons are missing out on £20billion in lost interest every year, with £526billion sitting idle in current and low-interest savings accounts. Rachel Springall, finance expert at , said: "There are unfortunately some savers keeping their hard-earned cash in a current or savings account that pays poor returns and is eaten away by inflation. However, this money could work so much harder if consumers just take a little time out of their day to open an easy access account that pays better returns, which is quick and easy to do."

Here is a list of the savings accounts offering the highest interest rates at the time of writing, according to Moneyfacts data.

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

• Revolut Ultra - 5% AER / gross
• Chip - 4.76% AER / gross
• Sidekick Money - 4.76% AER
• Atom Bank - 4.75% AER / 4.65% gross
• Chase - 4.75% AER / 4.65% gross
• Monument Bank - 4.75% AER / 4.65% gross
• Vida Savings - 4.63% AER / gross
• Chip - 4.6% AER / gross
• Oxbury Bank - 4.58% AER / 4.49% gross
• Chetwood Bank - 4.52% AER / 4.43% 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 - 6.5% AER/gross
• Virgin Money - 6.5% 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

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

One-year fixes:

• Cynergy Bank - 4.55% AER/gross
• GB Bank - 4.55% AER/gross
• Tandem Bank - 4.55% AER/gross.

Two-year fixes:

• JN Bank - 4.48% AER/gross
• Cynergy Bank - 4.45% AER/gross
• GB Bank - 4.43% AER/gross.

Three-year fixes:

• JN Bank - 4.48% AER/gross
• Birmingham Bank - 4.42% AER / gross
• UBL UK - 4.41% AER / gross.

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

• Moneybox - 5.71% AER / gross
• Trading 212 - 5.07% AER
• Plum - 5.06% AER
• Moneybox - 5.05% AER / gross
• Tembo Money - 4.8% AER
• Monument Bank - 4.76% AER / 4.66% gross
• Vida Savings - 4.63% AER /gross
• Charter Savings Bank - 4.56% AER /gross
• Vida Savings - 4.55% AER/gross
• Buckinghamshire Building Society - 4.53% AER/gross

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

• Punjab National Bank - 4.35% AER
• Castle Trust Bank - 4.26% AER
• OakNorth Bank - 4.26% AER
• Cynergy Bank - 4.25% AER
• Hodge Bank - 4.25% AER
• Kent Reliance - 4.25% AER / gross
• Saffron Building Society - 4.25% AER
• Santander - 4.25% AER
• State Bank of India - 4.25% AER
• United Trust Bank - 4.25% AER.