Missed call text back for mechanics: the call you had your hands full for.

Between about seven and nine every car booked for the day arrives at once, and so do the calls from the people who did not book. One person cannot do both, and in most workshops there is only one person on the counter.

The shape of a workshop day is unusual. There is a wall of arrivals first thing, a quiet stretch while the work happens, and a second wall at pick-up. The phone follows the same shape, because people ring on their way to work and on their way home.

In the middle of the day the calls do not stop, they just arrive while everybody is under a car with their hands covered in oil. A ringing phone in a workshop is genuinely hard to answer, and often it is not safe to.

So the calls that go unanswered are not spread evenly. They land in the two windows where the workshop is at its busiest and least able to pick up.

A driver whose car will not start does not leave a message. They ring the next workshop on the map, and the one after that, until somebody answers and can fit them in this week.

That is why this goes unnoticed for years. Nothing appears in the booking system, nothing appears in the till, and the only evidence is a quiet Thursday that could have been busy.

There is also a specific thing that happens with workshops. A driver who has never used you before is choosing off a search result, and every option on that screen looks much the same to them. Whoever picks up is the one who gets tried.

What makes it worse for a workshop than for most businesses

• The caller has a deadline.

  A car off the road is a person who cannot get to work tomorrow. They are not shopping, they are solving something today.

• Your hands are literally full.

  A mechanic mid-job cannot take a call without stopping, cleaning up and walking to the phone.

• The first job is the smallest one.

  A logbook service is not much money. The customer who keeps coming back for ten years is.

The job on the phone is rarely the value. A first-time customer who gets answered becomes a decade of servicing, brakes, tyres and the occasional big repair, and none of that happens if they got voicemail.

Workshops undercount this more than most trades, because the mental price attached to the call is a service. The real number is that customer's lifetime, and in a suburban workshop that is measured in years rather than jobs.

There is a second loss on the same call. A driver who found somebody else also takes the second car in the household, and the family member they recommend.

The honest exception is a workshop already booked out four weeks with a waiting list. If turning work away is the current problem, catching more enquiries is not the fix and this is not worth buying.

When a call to the workshop rings out, a text goes back within seconds in the workshop's own words, saying the team is on the tools and asking what the car is doing and when they need it. The reply comes in writing and gets dealt with between jobs.

The reason it works in a workshop specifically is that the answer is almost never urgent. Nobody needs the car looked at in the next four minutes. They need to know they have been heard and that there is a booking coming.

A written reply is also more useful than the call would have been. Make, model, what the noise is, and when they need it back, all typed out by the customer, is a better start to a booking than a shouted conversation over an impact gun.

What it will not do

• It will not quote a repair.

  Nothing about price is sent, because no honest price exists before the car is looked at. It says a quote comes after a look, which is true.

• It will not diagnose anything.

  A description of a noise is not a diagnosis, and pretending otherwise is how a workshop loses trust before the car arrives.

• It will not take a booking on its own.

  It holds the enquiry and gathers the details. Putting a car in the diary stays with the person who knows what is on the hoist.