Police have been bombarded with more than 200,000 calls from people reporting their neighbours for breaching lockdown - an average of almost five a second.
New figures show more than 9,000 fines have been issued in the last four weeks for flouting the rules with 80% going to men.
Some 391 were for repeat offenders, with one person fined six times, three people fined five times and six people fined four times.
Deputy Chief Constable Sara Glen of Hampshire Police said reports of anti-social behaviour in the UK more than doubled to around 215,000 during the period, compared to around 106,000 last year.
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Data released by the National Police Chiefs' Council on Thursday shows 8,877 fixed penalty notices have been recorded by forces in England between March 27 and April 27, while 299 were issued in Wales over the same period.
In England, 4,152 fines were issued up to April 13, with a further 4,725 handed out in the two weeks up to April 27.
Ms Glen said younger people were more likely to breach the lockdown rules, with figures showing around eight out of 10 people fined were men, a third were aged between 18-24 and another third aged 25-34.
"The vast majority of the fines that we're seeing enforced are people actually not complying, being out in public spaces where they don't have a reasonable excuse to do so, not listening to the officers' advice in respect of engaging and explaining to the extent where the officer then has to issue a ticket to secure compliance," she said.
"There are some definite correlations when it gets hot and when it is good weather where we see troublesome spots, whether that's beaches or whether that's countryside, rural communities where people want to go and walk.
"We definitely have seen that when we've had hot weather, but on the whole, we are seeing, as soon as officers arrive as soon as they engage and explain, the vast, vast majority of the public are adhering to the rules."
Police have been given powers to hand out a £60 penalty, which is reduced to £30 if paid within two weeks, for breaches of the lockdown rules, with the fine doubled for each repeat offence up to a £960 maximum.
Of the 43 regional police forces in England and Wales, Thames Valley Police recorded the highest number of fines, with 649, while Warwickshire issued the fewest, with just 22.
NPCC chairman Martin Hewitt said: "As the latest provisional figures on the number of fines issued show, the vast majority of people continue to do the right thing, staying at home in order to protect the NHS and help save lives.
"The figures also show our use of the enforcement powers remains proportionate with just 0.02% of the population in England being issued with a fine."
He went on to say police face a different challenge when regulations are relaxed and more people are allowed out of their homes.
"There's an inevitability that as the weeks progress, this is harder for people and we are moving into warmer weather and I think everyone would accept that," he said.
"I think it's inevitable that people will get restless. This is now quite an extended period of time. This is hard on everybody adapting their lives.
"We would assess that over the weekend we sensed across the country a little bit more traffic on the roads and a few more people out and about.
"But having said all of that, we are still seeing the same level of compliance from people," he added.
This comes as Prime Minister Boris Johnson promised he would set out a "road map" for easing lockdown restrictions next week as Britain passed the peak.
This is despite fears deaths in care homes may be increasing and PPE levels are still not being met.
