Wilds Railway / Lilypad Rail S4-P and S5-P Stocks are trains that runs in the Let's Play server. They are based on M-train small variant, with texture that strongly resembles a [[wp>London_Underground_S7_and_S8_Stock|London Underground S7 and S8 Stock]]. The train starts to be in service from November 2022 and still operates in both Victory Line and Aldgate & Resort Line.

Wilds Railway acquired one S4-P stock from an unknown leasing company Porterbook and painted the handrail to A&R Green. The train enters service from November 2022 once the line has opened.

Following the introduction of S4-P stocks in Aldgate & Resort Line, Lilypad Rail raised an interest of introducing the SX-P stocks to unify the cooperate image in Greater Llanmara. As Lilypad Rail is satisfied by the quality of the train, they introduced a finite number of nearly identical train with Wilds Railway S4-P Stock, with the only 2 differences of being 5 cars and have all the handrails painted red instead. They are therefore called S5-P stocks, and entered service in around November to December 2022.