Clare Casalis

Senior Energy & Utilities Analyst

Clare joined MSE in September 2021 after a career as a chartered accountant. She started out as a writer on MSE's Money team, exploring everything from student loans to pensions, before moving across to the Energy and Utilities team in November 2022.

As Senior Energy and Utilities Analyst, Clare is responsible for the quarterly Price Cap updates to our guides, and the daily updates to our popular Should I fix my energy? guide, which explains if it's worth fixing your energy tariff, as well showing the current energy deals available. Clare also helps out on the Cheap Energy Club.

Clare has written several new guides, including Heat pumps explained, Is solar battery storage worth it?, How to switch your energy and, most recently, Winter Fuel Payments.

Outside of work, Clare's passionate about travel and embarks on global adventures with her family as often as she can (on a budget of course!). She also loves running and yoga to keep a healthy body and mind.

Latest from Clare Casalis

Clay model of a house, placed on top of a white radiator

30 January 2026

Row of bathroom sinks focused on one with water coming out of it.

29 January 2026

The Government is aiming for 80% of homes in England, Scotland and Wales to have a smart meter by the end of 2025. It's not compulsory to opt in to have one, but there are a few situations where you won't have a choice and your supplier will need to install smart meters. We've got the full info below, including what you can do if you don't want one.

29 January 2026

28 January 2026

Image shows a hand turning the heating knob on a radiator.

28 January 2026

The push towards electric vehicles (EVs) is growing and is likely to become more of a focus with the sale of new petrol and diesel cars to be banned by the end of 2035. We'll take you through how much they cost, how that compares to petrol and diesel cars, and everything else you need to know to help you decide if an EV is right for you now.

27 January 2026

At least half a million households are connected to one of 14,000 heat networks across the UK. From April 2025, all heat network consumers will have access to an official complaints and advice service, and from 2026, new regulations will be in place to better protect those connected to a heat network. This guide explains how heating networks work and what you can do if things go wrong – now and in the future.

27 January 2026

Energy suppliers are enticing new customers to switch, and getting existing customers to stay, with a whole host of rewards, from bill credit to cheap cinema tickets. But, whatever you do, don't switch to one of these suppliers purely for their rewards. Make sure you do a bespoke comparison to find the best energy deal for you. The rewards it offers should just be an added bonus.

26 January 2026

Utility Warehouse has two fixed energy deals that are up to 14% less than the April Price Cap on average. This may be a good deal for some, but it's not as simple as just switching your energy, as you have to take other products too.

22 January 2026

Small clay model of a house, propped on top of a radiator with a scarf wrapped around it.

21 January 2026

eSims have been around for more than a decade, but it's only recently they've become more widely available in the UK. Yet most UK firms still don't fully support them. Where they really shine is if you're planning a trip abroad. We take you through what an eSim is, how you can get one and whether it'll save you any money below – plus how to install one on an iPhone or Android mobile.

20 January 2026

There's lots of financial help available right now due to the cost of living crisis, as well as ongoing support for those on benefits. There's cash available to increase your home's energy efficiency or help you pay your energy bills – hundreds of millions of pounds of it. The key is knowing where to look.

15 January 2026

Attitudes and behaviours are changing and many are opting to go greener. In normal times, switching to a green energy tariff is easy, and can also save you money. Yet the recent energy market crisis means that very few 'green' tariffs are available right now. What's more, some of the green energy claims made by suppliers are now under scrutiny. This guide explains what green energy is and why it is a hot topic for debate right now.

15 January 2026

12 January 2026

Smart thermostats are a nifty way to control your heating on the go from your phone, tablet or other device. They're touted as a great way to save cash, but they're not cheap – so whether one will save you money depends on how you use it and what type of home you have. We've a few quick need-to-knows about how they work, then the top picks.

12 January 2026

Energy firms are banned from hitting you with an unexpected bill for any energy you used more than 12 months ago, that you haven't been correctly billed for before. But there are over 3,000 complaints to the ombudsman of just this happening – here's what you need to know...

7 January 2026