Complete the following sentence: Robert was appointed governor of Porchester Castle in 50 Henry III (1265<unk>6). He accompanied Edward I on
️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk> ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Tiptoft was responsible for the compulsory introduction of "English customs" in South Wales which then prompted the revolt of Rhys ap Maredudd in 1287<unk>8.