3 bed accommodation for 7, on I drive, no car. Advice needed!

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Hi. We are trying to find 3 bed accom. with sofa bed type thing in lounge. Needs to be on I drive, self catering, near super markets and restaurants, good access to public transport, as we don't want to hire a car. Would need 2 double rooms and one twin room. Washing machine etc too. And ideas?