This week's been busy for me, what with two demonstrations on two different campaigns. After the protest outside the Japanese Embassy, it was the Department of Transport's turn to welcome us. The government wasn't listening when we said NO to Heathrow's third runway last month. So this morning, we flashmobbed the Department of Transport and launched paper planes saying ‘NO AIRPORT EXPANSION' at transport secretary Ruth Kelly's office.

If you thought that the Terminal 5 flashmob and the Big NO! was all that would be done to oppose the third runway then you were wrong. On 3 July, get ready to flashmob once more and launch paper planes at the Department for Transport, and tell transport secretary Ruth Kelly why plans for the third runway must be scrapped.

Download a paper plane here and don't forget to write a message to Transport Secretary Ruth Kelly on it. The plan is to turn up outside Department for Transport (corner of Marsham St and Horseferry Road) at 11am sharp. If you've still got your red t-shirts from T5; even better but a paper plane is an absolute must. At 11.03 (precisely) those wearing ‘Stop Airport Expansion' t-shirts will reveal them, and then we will all launch our paper planes in the direction of the Department.

It’s Transport Minister Ruth Kelly's 40th birthday, and just now seven women from Sipson were at the Department for Transport to give her a birthday cake. But the message is less traditional, it's a big fat, creamy, sugary NO – well that's the shape of the cake anyway. They also sang happy birthday in the reception and staff got NO cupcakes.

You too can send Ruth Kelly a birthday message. She's in charge of Heathrow expansion, so send her a message asking her to join the Make a NOise carnival on May31st.

So, today the Renewable Transport Fuel Obligation (RTFO) comes into effect and we'll all be using more biofuels as a result. Regular readers will know that this exciting piece of legislation will see 2.5 per cent of our petrol and diesel coming from food crops, and that we have been asking everyone to send emails to transport secretary Ruth Kelly asking her to postpone the RTFO. Now we need to see that she abandons so if you haven't expressed your concern about this already, you can still do so.

In a few weeks' time on Tuesday 15 April, every fuel company in the UK will be obliged to include a certain amount of biofuel in their petrol and diesel supplies. This is because, to comply with EU policies, the government has decreed we will all be using biofuels whether we want to or not but as you're probably aware, a lot of people have severe concerns about this.