Advice on our upcoming move please?

Hi All, Firstly thank you for taking the time to read this.

My husband and I are looking to finally move the end of this month. He has a job to commence in Marbella, we have a rental agreement for a home in Yunquera, now..he had dual citizenship but Spanish passport is awaiting renewal (appt booked for 26th April in Manchester). Should be straightforward but we then have to wait for it to be posted from Spain to England etc..can we travel with just uk passports showing work and rental  contracts overland (then collect passport in Spain).. many thanks