Mr Conniford, a 30-year veteran of Essex Police, told the Brazilian, an ex-military officer: 'The problems here have been all over the papers. It's bad. I get calls from management, from my bosses at the FA, freaking out saying, "Tony, are you sure it's safe?"
'They ask me, "Is this really going to be safe for the team?" They are worried. These are real concerns.
'We have to be extra vigilant. We cannot afford to make any mistakes. Security must be paramount.' Mr Conniford's comments - coming just a month before the tournament kicks off - raise serious question marks over the FA's decision to base themselves in central Rio. England's hotel, the ageing Royal Tulip, is rated by travel website TripAdvisor as only the 93rd best in the city.
Only one other team - Holland, who will train much closer to their hotel - are based in the city, while Germany have built their own private beach resort to stay in.
Mr Conniford told his colleague that a nine-mile trip between the squad's training base in a military camp at Sao Joao Fort in Urca in the shadow of Sugarloaf mountain and the hotel had taken him two hours. He said: 'The traffic is awful. Even with a police escort it will be a nightmare. The roads are terrible. The traffic is my biggest worry. This is a logistical nightmare. We have to work on how we get the team from A to B without getting held up.
'We will be stuck in traffic the whole time.'
The airport, where the England players and their retinue, totalling no fewer than 78 people, will have to travel to to get to their group games, is even further away.
Mr Conniford said he also had concerns about security within the Urca military base when England were training. He told the Brazilian: 'Your guys need to know they can challenge anyone to see their badges. They must check and re-check everyone.' And on hotel security, he said: 'We can't afford to let anyone in because once you are through that door out there you can go straight to the lift and get straight up to the players' rooms in no time.'
As more than 50,000 England fans prepare to descend on Brazil, it is hard to imagine they have much idea of what actually awaits them:
• A British oil worker was shot dead in a botched robbery last month.
• A few weeks ago, protesters marched on the Presidential Palace in Brasilia leading to riots in which 12 protesters and 30 police officers were injured.
• The host cities for England's first games - Manaus, Sao Paolo and Belo Horizonte - are plagued by robberies, murders and muggings.
• Sao Paolo has its own slum problem and, in Manaus, a steaming jungle city a four-hour flight north of Rio, child 'gangs' roam the streets robbing visitors at knifepoint.
The violence shows no sign of abating. One person was shot dead on Friday as Rio police clashed with armed men in a favela close to the England hotel.
Over the past six years the Rio authorities have established 39 so-called police pacification units, or UPPs, in the favelas in an attempt to smash drug and street gangs.
Adrian Bevington, Managing Director of Club England, said: 'The FA are confident in the security arrangements in place. Tony is a vastly experienced officer and was simply overheard doing his job. He has our full support.'
Tory MP Chris Heaton-Harris, who is a qualified referee and member of the All-Party Parliamentary Football Group, said last night: 'Like every English fan, I want our team and its management to be as safe as possible and would expect these concerns to have been addressed by now.'
- Mail On Sunday
