Please help --- alam intermittently goes off freelander td4 2004se

Hi could anyone please help me, I have a Freelander TD4 2004 SE
The Alam has started to go off intermittently, I've had a good look around
hooverd everywhere in side the car in case of spiders (dont no if a small thing like that would set it off anyway), closed all air vents off.
the alam goes off maybe once or twice a week then it will be fine for a couple of weeks, then starts going off for no reason again... at all times day and night.. much to my neighbors moans... the car is kept on my drive away from the road and anyone passing, cant afford to take it to a garage for an electrical check, im pritty handy on the mech side of things.
so any help advise would be most welcome
ALSO DOES ANYONE KNOW HOW I CAN LOCK THE CAR WITHOUT THE ALARM BEING SET.....

there a number of things to check:

1) check the vehicle battery, a failing / low voltage battery can cause issues with the alarm
2) there also sensors on the bonnet, boot, and if you have a 3 door, in the roof to check if the roof has been lifted, as well as the door sensors.
3) to lock the car without setting the alarm, use the key. Turn anti-clockwise once and release to lock with no alarm, turn again to superlock and turn alarm on.

good luck

Probably just feeling lonely, you know what these gay, hair dressing, attention seeking types are like

Thanks for that info will give it a try cheers...