Britannia has been ranked as the worst hotel chain in the UK for a ninth consecutive year, according to an annual survey by consumer group Which?.
Cheshire-headquartered Britannia, which has 61 hotels across the UK including Liverpool city centre's Adelphi and Scarisbrick Hotel in Southport, has come bottom of the pile after receiving an average customer score of only 49%.
More than half (51%) of Britannia guests surveyed said they ran into a problem during their stay, with cleanliness being the most common issue.
READ MORE: Britannia Hotels: Who's behind firm named UK's worst chain - and which hotels does it own?
READ MORE: Britannia Hotels' sales continue to soar after being rated UK's worst chain for eighth year in a row
The chain was rated one star out of five for bathrooms, and two stars for seven other categories such as cleanliness, customer service and value for money, the PA news agency has reported.
One customer said: "It was terrible. The room was dirty. The bathroom was dirty. The carpet was terrible, stains everywhere."
Others complained about hotels being "run into the ground" and "in need of a drastic makeover". The average price paid of those surveyed for a one-night stay was £99.
Also rated as one of the worst was Mercure, which had an average customer score of 52%, with many guests observing that its standards have fallen.
One consumer said the chain's hotels are "not as smart as they used to be" and it has "some poor quality properties".
It was rated just two stars for cleanliness, rooms, bathrooms, communal areas and value for money. Mercure guests surveyed paid an average of £114 for one night.
Premier Inn, with an average price per night of £66, was the best performing large hotel chain with a customer score of 79%.
It was topped by the best small chain, Hotel du Vin, which scored 80%. Its guests paid an average of £150 for one night.
The research features 24 large hotel chains and six small ones.
A total of 2,371 members of the public and Which? members who stayed in a UK hotel in the 15 months to October 2021 were surveyed.
This included 57 who had visited a Britannia hotel and 73 who had spent the night at a Mercure property.
Which? travel editor Rory Boland said: "Year after year, guests are let down by Britannia's run-down hotels and often dirty rooms.
"This year saw some slight improvements to the chain's score - but not enough to drag it off the bottom of our rankings.
"Until the company ups its game further we would urge guests to look elsewhere.
"The impressive, budget-friendly Premier Inn is our pick of the large chains, and Hotel du Vin offers high quality stays in interesting locations."
A spokesman for Mercure said: "We are surprised to see our position in this survey.
"It does not reflect the high standard of guest experience which we strive for, and we will take action to address these comments.
"The experience and wellbeing of our guests at each and every property is our highest priority."
It added that it was ranked "amongst the top mid-scale brands" in the latest annual hotel guest survey by research consultancy BDRC.
