Train operator Chiltern Railways as informed rail passengers about strikes taking place next month.
The strike by Alef is in effect on October 1 and 5 and by the RMT on October 1.
Chiltern Railways said they are working on plans for the train service over the coming weeks.
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Railway workers on Network Rail and 14 train operating companies are striking over job security, pay and working conditions.
RMT general secretary Mick Lynch said: “Transport workers are joining a wave of strike action on October 1st, sending a clear message to the government and employers that working people will not accept continued attacks on pay and working conditions at a time when big business profits are at an all-time high.
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”The Summer of Solidarity we have seen will continue into the Autumn and Winter if employers and the government continue to refuse workers reasonable demands.
“We want a settlement to these disputes where our members and their families can get a square deal. And we will not rest until we get a satisfactory outcome.”
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