Jarvo tried to deliver a ball and bumped into Bairstow on day 2 at the Oval.
He had first breached security at the Lord’s ground during the second Test and had entered the field when India was fielding and took position to bowl. He then appeared again, wearing Test whites similar to those of Indian team's with Jarvo and number 69 on the back, during the third Test in Headingley.
He was wearing a bat, pads, and a helmet to the middle to bat after India lost a wicket, but was dragged off the field by security personnel.
Many cricket experts and fans didn’t find Jarvo’s repeated intrusions o the field while India and England played a Test funny anymore and questions were raised on the level of security provided by the ECB for the series, as it would have made quite a noise had it happened in India.
When everyone thought they had seen the last of Jarvo in Leeds, he made a surprise appearance on day two of the fourth Test at Oval and even tried to bowl a delivery to Ollie Pope and collided with non-striker Jonny Bairstow in his runup.
Here are the videos of Jarvo striking again:
He was again caught and removed from the field of play, but many once again raised questions about the security provided by ECB, and Harsha Bhogle and Wasim Jaffer tweeted about it saying that it is no more a joke now and a serious breach.