Basil --pinch ou the middles so they bush out and keep them warm still
Cabbages & broccoli can all stay outside as they are tough plants. When they are about four inches or so tall, plant them out in the ground, as deep as their first proper leaves. Make sure butterflies cannot lay eggs on them , slugs eat them or pigeons peck them (debris netting does it for me, coupled wih slug pellets). Firm the ground down well, and leave enough space for the sixe of the plant --- sprouts and sprouting broccoli will need staking later when they get bigger, and remember they will be there unitl next spring.
Celery looks like it could do with repotting on, again as deep as the first leaves as it looks a bit spindly. needs to stay inside frost free and bright, and likes to be damp. When it has about four decent leaves plant it out in a small block about ten inches between plants... slug pellets again -- if it suddenly has a growth spurt, wait until there are no more frosts forecast.
Peas -- harden these off and plant them out. Protect agains slugs and pigeons. GIve them something to cling onto as they grow. As they are tall peas, this might mean something six feet or more high. Check the packet
Hope that helps