First Utility is the best energy company in the UK, according to the latest figures from Citizens Advice.

It led the way in this quarter's figures, scoring an impressive 4.4 out of 5 stars, closely followed by EDF Energy on 4.2.

That means First Utility has made some serious improvements since the start of the year, when it had a score of just 2.9 stars. SSE fell the furthest, from the top of the table last time to 10th place in the latest figures.

Economy Energy has once again been named the worst energy provider, making this the second quarter in a row that it’s come bottom of the league.

Economy Energy only managed to rack up a star rating of 1.8 out of 5 for the period of July to September 2017. That’s a fall from its previous low of 2.2 for its service between April and June this year.

It’s a particularly poor showing for the company, which had ranked third in the first quarter of the year, with a respectable score of 3.85. One customer had to seek help from Citizens Advice after chasing them for an accurate bill for five full months.

How the ratings are determined

The Citizens Advice star rating system scores energy firms against five criteria including:

  • Complaints    how well energy suppliers handle customer complaints;
  • Ease of switching    the number of switches the supplier successfully carries out within 21 days;
  • Ease of contact    how highly people rate their supplier’s customer service;
  • Bill clarity    how easy people find it to understand their bills;
  • Switch Guarantee    whether the supplier is signed up to the switch guarantee that commits them to switching a customer within 21 days.

[Read more: How to save hundreds on your energy bills without switching]

The results in full

Here are the full results of the latest Citizens Advice survey, starting with the best performers this quarter:

Supplier

Star rating April to June 2017

Star rating July to September 2017

First Utility

4.1

4.4

EDF Energy

4

4.2

Flow Energy

3.85

4.15

Utility Warehouse

3.9

4.15

Ovo Energy

3.7

4

Ecotricity

4.4

3.9

British Gas

3.7

3.75

E.On

3.65

3.6

E (Gas and electricity)

3.25

3.5

SSE

4.5

3.4

Scottish Power

3.1

3.1

npower

3.25

3.1

Green Star Energy

3.1

3.05

Utilita

3.25

3.05

Co-operative Energy

2.95

2.85

Extra Energy

2.55

2.55

iSupply

n/a

2.25

Spark Energy

3.7

1.85

Economy Energy

2.2

1.8

Source: Citizens Advice

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