In front of her family and friends at the Life Centre, Lobb took third place behind Scotland Commonwealth Games athlete Gemma McArthur, who won with 327.75 points, and Olympian Lois Toulson.
“I’m really pleased,” said Lobb afterwards. “It is my first competition in a year-and-a-half doing my full list off the 10m, so I am over the moon.
“I have had a lot of injuries – I’ve had a back injury, a shoulder injury and triceps injuries. I have just been trying to get over all of them. But I have been working hard up to this competition.”
She added: “I had a really good junior career but when I went into the seniors that was when I got injured a lot and I have really struggled to get back into it. It (getting injured) really drops your motivation, but getting this medal will really help.”
Lobb has returned to Plymouth after a spell in London, where she was studying. However, she has now transferred her course to Marjon University and she feels being back at home has helped her diving.
“It is lovely to be back – home is home,” she said. “It is nice having that family support all the time and having my friends around as well.
“It’s also been great having Alex (Rochas), the new coach down here, helping me. He’s really supportive and he has helped me do what I did today.”
On what her goals are now, Lobb said: “I’m hoping to qualify for some Grand Prix events this year and see how that goes.”
There was also a bronze medal for Plymouth Diving’s Victoria Vincent, who made the podium in the women’s three-metre synchro final with Sheffield’s Yasmin Harper.
The pair scored 243.78 points to finish behind Great Britain star’s Katherine Torrance and Grace Reid and Maria Papworth-Burrel and Scarlett Mew.
In the same final, Plymouth Diving’s Kayleigh Sinclair and Summer Radcliffe finished fifth.
Sinclair had also made the women’s one-metre springboard final on the opening day of the competition, where she finished sixth.
Plymouth’s world champion Tom Daley impressed with his new synchro partner Matty Lee on Saturday evening as they claimed victory at Life Centre.
The pair (pictured top) topped the podium in the men’s platform competition with a total of 421.41 points, which was well ahead of the rest of the field.
Second place went to Ben Cutmore and Lucas Thomson with 363.03 points, with Noah Williams and Kyle Kothari securing bronze with 329.61 points.
Afterwards Daley said: “It was great; I really enjoyed myself. It was the first time me and Matty had done our full 10m list and we scored 421 points which is a pretty good, world class score for the first time.”
Daley will dive in the individual event on Sunday at the National Cup along with Plymouth Diving’s Matthew Dixon, Aidan Heslop, Connor West, Josh Freeman and Euan McCabe.
“I’m looking forward to it,” said Daley. “It is the first time I have done a national championships for a long time and what a better place to do it than in my home town.”
Heslop could not have come closer to qualifying for the men’s three-metre final on Saturday. He missed out by just one place in a high-class field with a score of 334.15 points.
Youngster Euan McCabe also dived well to finish 12th Brit with 284.80 points.
Fellow Plymouth diver Cody Powell-Tuckett also just missed out by one place on reaching the final in the women’s platform competition.