Here are a few general tips for hiring minibuses:

• Look for companies that have a good reputation and multiple positive reviews online. This gives you confidence they provide quality, reliable service.
• Make sure the company is properly licensed and insured. Ask to see proof of up-to-date credentials. This protects you in case of any incidents during your rental.
• Inquire about the condition of their vehicles. Well-maintained minibuses with recent inspection records will give you peace of mind on the road.
• Compare rates and services between a few different companies. Look for any deals, discounts or inclusive features in their pricing to maximise value.
• Ask what is included – mileage, insurance, driver fees etc. – and what would incur extra costs. Get a clear written quote.
• For airport transfers, ensure they know your flight details and can monitor for delays/changes.
• Discuss how many passengers you need to transport and specify the pickup/dropoff places and times.
• Read all rental terms, policies and procedures carefully before booking. Ask questions if anything is unclear. 
• Minibus hire companies provide transportation services using multi-passenger minibuses that can be chartered for various transportation needs.

I hope these tips help provide some guidance on things to look for when hiring a minibus service in the Speke area or anywhere else!