Yes, Freesat is delivered via satellite so almost every household in the UK will be in coverage. You will need a fully installed satellite dish, which can be arranged in store when you purchase Freesat.
The satellite dish needs to be positioned so it has a clear line of sight to the sky in the South East. A few people may not be able to get Freesat as their dish can't be positioned to see the satellite properly.
If you live in a rented property, conservation area or listed building there may be some restrictions on installing satellite equipment on your property. Please contact your local council or landlord for information on requirements in your building or area.