Fawkes’s confession, plus James I’s account of the plot called the ‘King’s book’, helped encourage widespread anti-Catholic attitudes.
In 1605, the Thanksgiving Act ordered that the events of the 5 November should be commemorated each year (the origins of bonfire night), and Catholics were banned from working in the legal profession or becoming army officers.
In 1606, the Popish Recusants Act forced Catholics to take an oath of allegiance to the English crown. If they did not attend Church of England services they would have to pay recusancy fines.
Catholics continued to be banned from voting, becoming MPs or owning land until 1829.