Jessica, the biggest name at LEAP, won the long jump with a leap of 6.21 metres and threw 44.73 metres in the javelin.
While many of her Team GB team mates will make Crystal Palace their last event before the Olympics, Jessica said she was delighted to be back at Loughborough University again - and even happier to have sorted out the long jump problems that plagued her at the Olympic trials.
“I’m used to doing meets like this and I’m happy to be doing my last preparation here,” said the former European and world heptathlon champion.
“It’s going to be very different at the Olympics and having that massive crowd will give you so much and help your performance. I’m looking forward to it.
“I’m just glad, touch wood, that I am in one piece. It’s my last competition so I have done all I can do. I’ll go away to the holding camp (in Portugal) and just sharpen up the best I can.
“I have done all the hard work, it’s now about putting it together in competition on those two days.
“I wouldn’t say I’m confident, I know everyone is going to be in great shape. I feel in good shape, I just want to be there and beginning it now.”
While her long jump was 30cm below her personal best and the javelin throw more than two metres down, she was happy.
“I’m not pleased with the (long jump) distance but after the trials I had to make changes to make sure I was getting on the board and not fouling. I felt loads better. My run up is much better, I just have to work on some flight stuff now.
“The javelin was good. I’d always love to throw a pb but I’m happy where I am at this stage. I don’t want to have my big throws too early.”