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Lloyds Bank has boosted its range of fixed savings accounts with its Isas now offering rates as high as 4.65 per cent.

The biggest jumps are on shorter fixes. Lloyds' one-year fixed-rate Isa has increased from 4 per cent to 4.55 per cent and its one-year fixed-rate bond has leapt from 3.8 per cent to 4.3 per cent, firing them up the independent This is Money savings tables.

The 4.65 per cent rate is available on longer two-year and five-year fixed Isas, although a five-year fix is only offered by Halifax – owned by Lloyds.

Lloyds joins a troupe of high-street banks hiking rates on fixed Isas to make them more attractive to savers.

In recent weeks we've seen rate increases from the likes of HSBC, Nationwide and Santander.

Lloyds' hikes across each of its brands nudge the bank up our best-buy savings tables. 

It's offering the top one, two and five-year fixed Isas from a high-street bank, although you can achieve better rates with less well-known providers.

Lloyds has hiked rates on both fixed-rate Isas and fixed-rate bonds across its three brands – Bank of Scotland, Halifax and Lloyds.

Fixed-rate Isas are tax-free so there's nothing to pay on the interest earned in one.

On the other hand, there's tax to pay on interest from a fixed-rate bond if you earn more than your personal savings allowance in the tax year.

High-street banks have introduced good rates on fixed Isas over the last few weeks. 

However they've been lowering them more recently, so those who prefer to save with well-known names will welcome Lloyds' new deals.

Nationwide sits a close second behind Lloyds in terms of the best fixed-rate Isas offered by high-street banks.

It offers 4.5 per cent on a one-year fixed-rate Isa, 4.55 per cent on a two-year fix and 4.6 per cent on three and five-year fixes.

If you're prepared to venture further afield than high-street names, you can currently achieve even stronger fixed rates, with providers hiking them to as high as 4.71 per cent.

This rate is offered by challenger bank Tandem on its two-year fixed Isa.

You might prefer easy-access accounts over fixed ones and rates remain strong here too. 

Many providers pay 12-month bonus rates that elevate underlying rates, which can sometimes be weak. 

You should check your rate and potentially transfer out of the account after the year is up.

Trading 212* continues to offer a top easy-access Isa at a rate of 4.51 per cent, which includes a fixed 0.91 per cent 12-month boost for new customers on top of the underlying 3.6 per cent variable rate.

The Isa is flexible so your allowance won't reduce as long as you replace withdrawals in the same tax year. 

Trading 212 doesn't penalise you for taking money out and you can open an account with just £1.

Plum* is offering a slightly lower rate of 4.5 per cent including a 1.96 per cent 12-month bonus – so the underlying rate is weaker than Trading 212's at 2.54 per cent.

This account is also a flexible Isa, doesn't penalise you for making withdrawals, and you can open it with just £1.

Easy-access Isas offered by well-known names are notably weaker on rates. 

Tesco Bank is offering 4.06 per cent, but this includes a huge 3.01 per cent 12-month bonus, so if you don't transfer out you'll be left languishing on a paltry rate.