He added if Mr Johnson decides what the country wants with immigration, in particular Brexit and Conservative voters, he needs a serious plan to reduce it.
Mr Timothy said: “Without clear and aggressive objectives to reduce immigration set by politicians on behalf of voters, annual statements and independent offices will simply become a means of managing massive levels of immigration.”
He suggested introducing visa targets for families, students and workers as well as targets relating to migration and citizenship.
Mr Timothy added: “But we must have a clear objective to cut immigration overall, without that there will be no pressure on ministers and officials to bring the numbers down.”
He argued if the country is dependent on migration for skilled workers like plumbers, doctors and service workers then standards need to be improved to train and support UK citizens to do them instead.