S&P Global Ratings has lowered its issue ratings on Thames Water Utilities Finance PLC’s debt, owing to operational performance issues, high leverage, a heavy investment plan, and the current high inflationary environment.

The ratings agency has lowered its class A debt rating to 'BBB' from 'BBB+', and its class B ratings to 'BB+' from 'BBB-', according to its latest research update.
However, while S&P expects the impact of the investment plan and high inflation to weigh on the water company’s financial metrics until the end of AMP7 in March 2025, both are expected to be beneficial to Thames Water over the medium term.
S&P’s stable outlook for the company is based on the expectation that metrics will gradually improve through the regulatory period ending March 2025.
S&P says in the update:
“Thames Water Utilities Finance PLC's financial resilience has been significantly affected by legacy operational performance issues, high leverage, a heavy investment plan, and the current high inflationary environment.”
According to S&P, any near-term improvement in Thames Water's credit metrics will “ultimately depend on any potential further measures by its owners to shore up financial resilience.”
The U.K.'s largest water and sewerage company is owned by a consortium of institutional shareholders, predominantly pension funds - the consortium has not taken any dividends for the past five years.
In June 2022 Thames Water committed to spend roughly around £2 billion above its Ofwat-permitted total expenditure for AMP7, taking its investment to £11.5 billion during the current regulatory period. In June the consortium approved a £500 million equity contribution to fund additional investments to speed up improvements in the water networks as well as committing an addition £1 billion in equity support.
The S&P research update states:
“Although there is broad shareholder commitment in this regard, the timing and amount of any further support remains uncertain. In the longer term, we could see improved leverage metrics once current investments materialize, delivering a stronger asset base and better operating performance for the company.”
Thames’ large investment plan coupled with high inflation has caused a significant increase in debt, according to S&P. Contrasted with a regulatory capital value of £16.6 billion in March 2022, the combination of capex and inflation led to an increase in net debt of £900 million between March 2021 and March 2022 to £13.7 billion.
Thames Water is currently in year two of the eight-year transformation plan it launched in March 2021. In S&P’s view, the scale of the eight-year transformation plan “highlights the extent of the operational issues facing the company.”
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