Spanish resorts Costa lot less for families self-catering on their summer break
- Shopping costs are cheapest in Spain as Costa Blanca beats the Algarve to best value slot for families self-catering on holiday
- Self-caterers could pay double the Spain price in Eastern Med supermarkets
- 49 per cent of parents go self-catering to cut holiday costs - but over 1-in-5 admit busting their budget by over £100
- They could save up to 36 per cent shopping at supermarkets ra
