Rail workers at South Western Railway are to strike again next month in the long-running dispute over pay and conditions.
Members of the RMT union working for the UK's 14 train companies will walkout on Friday, June 2.
The strike on June 2 will see 20,000 railway workers in catering, train managers and station staff all take action, affecting train services across the country.
It means there will be three rail strikes within four days with Aslef train drivers walking out on May 31 and June 3, the day of the FA Cup final.
RMT general secretary Mick Lynch said: "The government is once again not allowing the Rail Delivery Group to make an improved offer that we can consider.
"Therefore, we have to pursue our industrial campaign to win a negotiated settlement on jobs, pay and conditions.
"Ministers cannot just wish this dispute away.
"They underestimate the strength of feeling our members who have just given us a new 6-month strike mandate, continue to support the campaign and the action and are determined to see this through until we get an acceptable resolution.
"The government now needs to unlock the RDG and allow them to make an offer that can be put to a referendum of our members."
The government has called again for the RMT union to allow its members to have a vote on what it described as the "fair and reasonable offer" tabled by the RDG.
A spokesperson for the Department for Transport also said: "It's extremely disappointing that for the second time in a month, RMT has decided to call strikes on the same weekend as Aslef, going out of their way to make travelling by train to the FA Cup final, Epsom Derby and a number of music concerts more difficult for thousands of people."
The 14 train companies affected by the RMT's ongoing strike action are: Chiltern Railways, Cross Country Trains, Greater Anglia, LNER, East Midlands Railway, c2c, Great Western Railway, Northern Trains, South Eastern, South Western Railway, Transpennine Express, Avanti West Coast, West Midlands Trains and GTR (including Gatwick Express)