Who is perkin warbeck Lambert simnel?

Perkin Warbeck and Lambert Simnel were both figures involved in pretender claims to the English throne during the late 15th century. Lambert Simnel, a boy claiming to be Edward, Earl of Warwick, was supported by Yorkist factions in 1487 and challenged Henry VII. Perkin Warbeck, who claimed to be Richard, Duke of York, was active in the 1490s and garnered support from various European courts. Both pretenders ultimately failed in their attempts to usurp the throne and faced dire consequences.