Dogs Trust Car Safety Harness

Best price: £11.50

This is available in six sizes, and we chose one for Jarvis based on the website’s recommendation and it suited him perfectly, thanks to adjustable straps. There’s a buckle that loops into the seatbelt, so it gave our dog space to sit down while being secure. We also liked the high-visibility piping, which makes it ideal for use outside the car as a reflective harness, too.