The man who halted the University Boat Race has been told to avoid several public events including the Olympic torch relay.
British Olympic Association chairman Lord Moynihan has said that security chiefs "can never completely remove" the threat of disruption.
The 158th University Boat race had to be halted after a protester swam towards the boats.
For those who weren't boat race fans, the real action took place at Spitalfields City Farm today, at the fifth annual Oxford and Cambridge Goat race.
Two goats, named after each university, went head to head. The event was so popular that over a thousand early tickets sold out.
The winning crew finished in 17 minutes and 27 seconds to cut Cambridge's overall lead to 81-77.
Oxford have emerged as clear favourites to win the Boat Race after more than 70% of bets were placed on the Dark Blues, according to bookmaker William Hill.
Spokesman Joe Crilly said: "Oxford are certainly the best backed crew as of yet, although that was very much the case at this stage of proceedings last year.
"Last year, however, we took nearly £40,000 on the day of the race and Cambridge became best backed by the time the race started. Maybe history will repeat itself this time around."
Don't forget, later on is the annual @theboatrace between Putney and Chiswick. Bridges affected include Putney, Hammersmith, ...cont. (1/2)
It may be over-shadowed by its rowing equivalent but the 5th annual Oxford and Cambridge Goat Race also takes place today.
The race between the two goats, named after the famous universities, will happen at Spitalfields City Farm in East London.
Here's a glimpse of what happened last year:
Royal Marines will patrol the River Thames today to make sure there is no disruption to the Oxford and Cambridge Boat Race.
Organisers are trying to stop any repeat of last year when the annual race was stopped by Trenton Oldfield, who swam into the path of the crews.
The race's Executive Director, David Searle, said: "We are taking additional measures this year and have reviewed all of our actions last year in detail.
"The Boat Race course is four and a quarter miles long so we have eight and a half miles of riverbank to manage and monitor.
"What I would say to anybody thinking of disrupting the race is that it's unbelievably dangerous. You risk injuring yourself, the crews and the other people following the race.
"Nobody wants that to happen. This is just a sporting event."
Royal Marines will be stationed in inflatable boats along the length of the Boat Race course tomorrow to ensure the event is not disrupted by another protester in the water.
Last year's race had to be halted when Trenton Oldfield swam into the path of the two crews and narrowly avoided being struck by an Oxford oar as he looked to sabotage an event he regarded as elitist.
Oldfield was released from prison in December having served seven weeks of a six-month sentence after being found guilty of causing a public nuisance.
Cambridge won the restarted race.
Royal Marines will be positioned along the bank of the River Thames between Putney and Chiswick for this year's Boat Race. It comes after protestor, Trenton Oldfield was jailed for swimming across the path of rowers during last year's race.
Oldfield was released from prison in December 2012 after serving seven weeks of a six month sentence for causing a public nuisance.
The Metropolitan Police recently contacted him to see if he was planning to protest at the 2013 event. Oldfield wrote back saying "I'll probably have a walk in the Cotswolds instead."
Security is going to be stepped up at this year's University Boat Race.
The London Royal Marines Reserve will provide a visible, unarmed presence on the river.
It comes after last year's race, when protester Trenton Oldfield swam into the paths of the crews.